Our Team

We are a team of clinicians, researchers, data scientists and technical staff working to improve healthcare with hospital data.

GEMINI Executive Team

Co-Lead

Co-Lead

Director, Operations & Strategic Partnerships

Director, Data Science & Innovation

Team Members

Data Quality Analyst

General Internist

Data Quality Analyst

Data Quality Analyst

Senior Scientist

Senior Data Scientist

General Internist

Director, Data Science & Innovation

Research Data Scientist

Research Coordinator

General Internist

Co-Lead

Scientific Lead & Manager

Research Data Scientist

Manager, Research Data Operations

Psychiatrist

Senior Data Scientist

Research Data Scientist

Amol Verma

Co-Lead

My role with the GEMINI team:

I am an internal medicine physician and scientist at Unity Health Toronto and the Temerty Professor of AI Research and Education in Medicine at the University of Toronto.

My educational background:

I completed a BSc in Microbiology and Immunology at Dalhousie, medical school and residency at the University of Toronto, a Masters in Economic and Social History at the University of Oxford as a Rhodes Scholar, a 1-year interdisciplinary fellowship with the Canadian Frailty Network a 2-year research fellowship studying big data and advanced analytics in the Clinician Investigator Program of the Royal College of Physicians and Surgeons of Canada, and a 1-year fellowship in Artificial Intelligence and Compassion with AMS Healthcare.​

My past experience and accomplishments:

I serve as a Provincial Clinical Lead for Quality Improvement in General Internal Medicine with Ontario Health, the Vice-Chair of the Researcher Council of the Digital Research Alliance of Canada, and was a member of the Council of Canadian Academies Expert Panel on Health Data Sharing. I received the 2023 Canadian Society of Internal Medicine New Investigator Award, the 2022 Royal College of Physicians and Surgeons of Canada Early Career Leadership Award and the 2022 Canadian Institutes of Health Research’s early career Trailblazer Award in Population and Public Health Research. 

I feel most inspired when:

I am near the ocean.​

Fahad Razak

Co-Lead

My role with the GEMINI team:

I am a hospital-based general internist at St Michaels Hospital and Scientist at the Li Ka Shing Knowledge Institute. I am co-lead of the GEMINI program. I am also the Provincial Co-Lead, Quality Improvement in General Internal Medicine at Ontario Health, and I find this a great fit for my clinical work and research focus. ​

At the University of Toronto, I am an Assistant Professor in the Department of Medicine and Institute of Health Policy, Management and Evaluation.  I am a member of the Ontario COVID-19 Science Advisory Table.

My educational background:

My training includes a degree in Engineering Science (Biomedical Engineering), Medical Doctorate, Residency and Fellowship in General Internal Medicine at the University of Toronto. I was the first physician appointed as a David E. Bell Fellow at Harvard University and my post-doctoral training focused on social determinants of health and population health through use of large datasets.

My past experience and accomplishments:

Notable research recognitions at the University of Toronto include the Dean’s Emerging Leader Award, the President’s Impact Award, and being named a Senior Fellow at Massey College. I received the Canadian Society of Internal Medicine’s New Investigator Award and the Graham Farquharson Knowledge Translation Fellowship from the PSI Foundation.  I have received >$65 million in grant funding as Principal Investigator from sources such as CIHR, NSERC, and the Canadian Cancer Society. I have published >100 peer-reviewed publications (h-index 35, >50 as first/senior author), including in high impact journals such as JAMA, the BMJ, PLOS Medicine and PNAS as first/senior author. 

I am  a Canada Research Chair in Data-Informed Health Care Improvement and Associate Professor at the University of Toronto. I serve as a Provincial Clinical Lead for Quality Improvement in General Internal Medicine with Ontario Health, and am Vice-President Research at the Canadian Society of Internal Medicine. I am on the advisory board of the BMJ.

I was the Scientific Director of the Ontario COVID-19 Science Advisory Table and co-authored >50 science and policy briefs that shaped the policy, public health and clinical response to the COVID-19 crisis. I am a member of the Federal Expert Panel on Science Advisory and Research convened by the Minister of Health.

I feel most inspired when:

I can see something grow that I have nurtured and cared for. For GEMINI, I feel inspired as I see our team grow stronger and more skilled in striving to achieve the complex and broad goals we have set for ourselves.

Vlad Kushnir

Director, Operations & Strategic Partnerships

Educational background

PhD in Pharmaceutical Science, University of Toronto

MSc in Pharmacology and Toxicology, University of Toronto

BSc (Hons) in Biology and Psychology, York University

My past accomplishments

Prior to joining GEMINI, I managed a research program at the Centre for Addiction and Mental Health, aimed at developing and evaluating the effectiveness of brief interventions for addictive disorders and co-morbid mental health issues. In my role, I guided the execution of randomized controlled trials and prospective studies, developed protocols and grants proposals, and managed all data collection and analysis efforts. Some of my key accomplishments include successfully leading a national trial on the real-world effectiveness of nicotine patches which involved over 2,000 participants, acquiring grant funding for problem gambling and tobacco dependence research from national and provincial agencies, and authoring dozens of publications in top-tier scientific journals.​

When I feel most inspired

I have the freedom to explore different ideas and make something my own.

A few of my favourite things

Backcountry canoe camping with my friends and kids

Building something with my kids (i.e. mini catapult, fuel-powered rocket, etc.), essentially anything that has the potential to be launched or explode

Backyard BBQ with friends and family on a sunny summer afternoon

Denise Mak

Director, Data Science & Innovation

Educational background

I have a Computer Science undergraduate degree from the University of Waterloo, as well as a Masters and PhD in Bioinformatics from Boston University.

My past accomplishments

I have been fortunate to have been involved with several major data projects that include managing a national longitudinal database of clinical patient data for a rare disease to studying mental illness using anonymized genetic data.

When I feel most inspired

I know I can’t save lives directly but try to contribute in other ways to make a meaningful impact.

A few of my favourite things

Relaxing with a cup of coffee or glass of wine (depending on the time of day)

Rewatching my favourite shows

Sitting by a fire doing any of the above!

​

Theresa Le

Data Quality Analyst

Educational background

​I completed my Bachelor’s of Science at the University of Toronto, majoring in Statistics.

My past accomplishments

I was a data analyst for a non-for-profit organization, where I prepared data for research and contributed to the publishing of the annual data report.

When I feel most inspired

When my work makes a meaningful and positive impact on the larger community.

A few of my favourite things

My cats, Soju and Sake

Iced coffee

Trying new restaurants around Toronto

Jessica Liu

General Internist

University Health Network

Dr. Jessica Liu is an Internal Medicine Physician at the University Health Network (UHN) and an Assistant Professor in the Department of Medicine at the University of Toronto, where she is a Clinician Investigator with a focus on healthcare quality improvement and innovation.In addition to her clinical practice, she has completed a research fellowship in quality improvement and patient safety with the Toronto division of the United States Veteran Affairs Quality Scholars Program (VAQS), which began as a joint collaboration between the U.S. Veterans Health Administration and the Dartmouth Institute for Health Policy and Clinical Practice. As of June 2016, she is also a research fellow with the Women’s College Hospital Institute for Health System Solutions and Virtual Care (WHIV).As part of a Mount Sinai Hospital research fellowship in quality and innovation, Dr. Liu has also worked as an Associate in the Healthcare Consulting Practice at PricewaterhouseCoopers (PwC) in Toronto, where she applied her medical and clinical experience to clients in the healthcare sector.Dr. Liu’s research focuses on patient safety and quality of care, and optimizing clinical processes and outcomes. Specifically, her recent research and publications have focused on pharmaceutical industry-physician conflicts of interest, online physician ratings and the patient experience; quality of care of hospitalized patients; and rates and characteristics of physician disciplinary action by provincial regulatory colleges.Following her medical education at the University of Western Ontario (UWO), Dr. Liu completed her clinical fellowship in Internal Medicine at the University of Toronto. Prior to this she obtained a research-based Masters of Science (Anatomy and Cell Biology) from UWO and acted as an Oncology Research Associate for Cytochroma Inc. (now OPKO Health), a private sector biotechnology firm.

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Bill Liu

Data Quality Analyst

Educational background

I completed my 2nd MSc majoring in Biostatistics at the University of Toronto in 2022.

I completed my 1st MSc majoring in Ecology and Evolutionary Biology at the University of Toronto in 2020.

I completed my HBSc double majoring in Biology and Philosophy at the University of Toronto in 2018.

My past accomplishments

I have had experience different fields such as philosophy, ecology, statistics, and public health

When I feel most inspired

I feel most inspired when I work with motivated individuals; there are so many things that I can learn from them.​

A few of my favourite things

Playing and listening to music

Lifting weights

Cooking and eating food

Chang Liu

Data Quality Analyst

Educational Background

I have a Bachelors of Science degree at U of T major in Math and Statistics

Geoffrey Liu

Senior Scientist

University Health Network

Dr. Liu graduated sum laude from the University of Toronto medicine program, followed by residencies at the University of Toronto and a fellowship at the Dana Farber Harvard Cancer Center in Boston. He was Assistant Professor of Medicine at Harvard Medical School before returning in 2006 to the Ontario Cancer Institute–Princess Margaret Hospital. Dr. Liu’s major research focus is in molecular prognostic factors and pharmacogenomics of lung and esophageal cancer, with additional interest in head and neck, pancreatic, ovarian and testicular cancers, mesothelioma and thymoma. Trained in clinical and molecular epidemiology, he is the principal investigator of over two dozen completed, ongoing and upcoming cancer pharmacogenomic and molecular epidemiologic analyses of cancer observational studies and clinical trials funded by the National Cancer Institute (US), National Cancer Institute of Canada Clinical Trials Group, Canadian Cancer Society Research Institute, the Canadian Institute of Health Research, the Ontario Institute of Cancer Research, Cancer Care Ontario, Doris Duke Foundation and the Lung Cancer Foundation of America. He has research interests in epidemiological outcomes database methods, novel analyses of high dimensionality biologically rich data, pharmacogenomic analyses of conventional and molecularly targeted agents using primary human xenograft models, patient-reported outcomes in pharmacogenomics, and knowledge translation of personalized medicine and pharmacogenomic algorithms into clinical practice. 

Anne Löffler

Senior Data Scientist

Educational background

PhD in Cognitive Neuroscience (University College London)

MSc in Neuroscience (McGill University)

BSc in Psychology (Humboldt University in Berlin)

My past accomplishments

Before joining GEMINI, I was a postdoctoral researcher in Cognitive Neuroscience at Columbia University. In my research, I investigated the dynamic brain mechanisms underlying decision-making in healthy and clinical populations, using a wide range of experimental and statistical approaches.

When I feel most inspired

I get to work with a great team of people, and together, try to tackle complex ‘real-world’ problems.

A few of my favourite things

Rock climbing

Camping/hiking

Board games

Thomas Macmillan

General Internist

University Health Network

Tom MacMillan is Assistant Professor of Medicine, University of Toronto and Clinician in Quality and Innovation in the Division of General Internal Medicine at Toronto Western Hospital, UHN.  He received his MD from Queen’s University and his Internal Medicine residency and General nternal Medicine fellowship training from the University of Toronto.  He obtained a Masters of Science in Quality Improvement and Patient Safety from the University of Toronto.

Dr. MacMillan’s academic interests include resource stewardship, deprescribing, and developing new models of GIM ambulatory care.  In 2016, Dr. MacMillan lead the implementation of a new program of GIM ambulatory clinics at TWH including a rapid referral clinic to reduce admissions from the emergency department, a post-discharge clinic to prevent readmissions to the GIM wards, and a hypertension clinic.  Dr. MacMillan is currently the lead for Quality Improvement and Ambulatory Care at the HoPingKong Centre for Excellence in Education and Practice at TWH.

Kayley Marchena

Research Data Scientist

Educational background

I have a Bachelors in Physics from Queens University of Charlotte and Masters in Medical Biophysics from the University of Toronto.

My past accomplishments

My past research focused on applying novel neuroimaging techniques on a range of clinical and research cohorts to better understand cerebrovascular function. Essentially, getting people to breath in CO2 to tell us something about their brain’s “plumbing” system.

When I feel most inspired

I’m volunteering! I love spreading joy by helping others. ​

A few of my favourite things

Running with the Midnight Runners

Watching dry British comedies

Visiting Costa Rica

Afsaneh Raissi

Research Coordinator

Educational background

I have a BSc in Electrical Engineering and a BSc in Psychology.

My past accomplishments

Prior to joining the GEMINI in January 2020, I worked as a Research Assistant in the department of Psychiatry at Sunnybrook Health Sciences Centre for two years, where I managed the day-to-day operations of a mood-tracking application.

Shail Rawal

General Internist

University Health Network

Dr. Shail Rawal is an Assistant Professor in the Department of Medicine at the University of Toronto and a General Internist at University Health Network. Her research examines the intersection of health equity and quality improvement.

Her recent work centres on the quality of care received by patients whose primary language is not English and the use of sociodemographic data and patient-reported outcomes to improve care.

Research Interests:

  • General internist and clinician in quality and innovation at University Health Network
  • Intersection of health equity and quality improvement
  • Characterizing the uses of patient-level sociodemographic data to improve patient care
  • Improving the quality of care received by patients with limited English proficiency.
  • Quality and safety of care in general internal medicine

Surain Roberts

Scientific Lead & Manager

Educational background

I completed my PhD at the Institute of Health Policy, Management and Evaluation at the University of Toronto, and my bachelors in Biological Sciences at The University of Chicago.

My past accomplishments

I am an Assistant Professor at the Institute of Health Policy, Management and Evaluation at the University of Toronto. Prior to joining GEMINI, I co-led the creation of the Canadian Network for Autoimmune Liver disease (CaNAL). CaNAL is a pan-Canadian registry collecting both retrospective and prospective long-term follow-up of individual patient data. I also serve as a freelance consultant providing analytical and data science services. After my bachelors, I spent a year teaching, mentoring, and evaluating twelve students in a for-credit 9th grade algebra class in south Chicago.

When I feel most inspired

When I’m surrounded by people who are passionate about what they do.

A few of my favourite things

Playing 30-second online bullet chess (I can click faster than I can think)

Discovering new and interesting hot sauces

Sudipta Saha

Research Data Scientist

Educational background

I completed my BSc from University of Toronto, specializing in Microbiology. I completed my Master of Science (SM) in Global Health and Population from Harvard T.H. Chan School of Public Health.

My past accomplishments

My past experience has been a mix of microbiology, social epidemiology and urban policy work. Broadly, my interests have been in understanding how health disparities are shaped by broader economic and social structures. For my Master’s thesis I worked with the municipal health secretariat in Fortaleza Brazil, to investigate the spatio-temporal dynamics and socio-economic correlates of homicide risk across neighborhoods. Prior to joining GEMINI, I was an Urban Fellow at the City of Toronto, where I worked first on climate resilience, and then in emergency planning when the pandemic hit.

A few of my favourite things

Cooking! I like to plan elaborate meals and cook with friends for dinner parties. When there is no pandemic.

Long bike rides surrounded by ~ nature ~

Kieran Shah

Manager, Research Data Operations

Educational background

I completed a Master’s of Public Health at Boston University in Biostatistics. For my thesis, I was able to work with the National Emergency Data Set and used both supervised and unsupervised machine learning techniques to better understand factors that affect emergency department length of stays.

My past accomplishments

Prior to joining GEMINI, I worked as a Statistician at the University of Guelph. I helped develop a forecast model to help future budgeting and enrolment planning at the University. I also worked with student services to develop models to help better understand student success.

Before I worked at the University of Guelph, I worked with Abt Associated in Boston. There, I helped construct research-ready datasets for the Department of Justice, and conducted analysis on Medicaid data to better understand access to mental health services.

When I feel most inspired

I’m working with great and friendly colleagues.

A few of my favourite things

Playing soccer (before the pandemic)

Running after my kids

Kathleen Sheehan

Psychiatrist

University Health Network

Dr. Kathleen Sheehan is a staff psychiatrist with the medical psychiatry program at the Centre for Mental Health-University Health Network. She is the principal investigator on several research projects and has been awarded grants from the Heart and Stroke Foundation of Canada and the University of Toronto.

Dr. Sheehan is a graduate of the Michael G. DeGroote School of Medicine at McMaster University and completed her psychiatry residency at the University of Toronto. Dr. Sheehan completed her B.Sc. in Neuroscience at the University of St. Andrews and subsequently obtained both her Masters in Neuroscience and Doctorate in Social Psychiatry at the University of Oxford.

Her clinical interests are in the fields of consultation-liaison psychiatry and psychotherapy. Her research focuses on quality of health care for individuals with co-occurring physical and mental illnesses, especially in the areas of stroke and delirium, as well as issues at the intersection of ethics, law and mental health care

Trong Shen

Senior Data Scientist

Educational background

Nanotechnology Engineering for my Bachelors and Biomedical Engineering for my Masters. Simply put, I learned lots about materials science, fabrication, and bioengineering.

My past accomplishments

Used to work at a bank; know a thing or two about banking, finance, and investment

Used to do wet lab during my masters, research topic involves image analysis, cardiomyocytes, and drug testing

Has some experience in semiconductors and hybrid car design

When I feel most inspired

I work with great people

I feel like I am contributing to the greater good of an organization

A few of my favourite things

Singing (I did lots of a cappella singing in university)

Playing basketball

Delicious pastries (texture is very important, it needs to have a lot of layers)

Jessica Shi

Research Data Scientist

Educational background

I have an Honours Bachelor of Science (Nutritional Science and Psychology) and Master of Public Health (Epidemiology) from the University of Toronto.

My past accomplishments

During my undergraduate studies, I did wet lab research to investigate nanoparticle-based drug delivery and effects of probiotics on bone growth. During my masters studies, I performed an interrupted time-series analysis using CIHI data in SAS, and documented R codes for a proposed machine learning methodology which would be applicable for future real-world survey datasets.

When I feel most inspired

I listen to people’s stories and walk in nature.

A few of my favourite things

Drawing

Watching documentaries, films, anime

Hiking