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Research Support Team

Data Management Staff

Maria Agda, Data Clerk

Ms. Maria Agda is a Data Clerk for the CIHR Canadian HIV Trials Network at CHÉOS.

Karin Bezuidenhout, Data Management Operations Lead



Ms. Karin Bezuidenhout is the Operations Lead for Data Management at CHÉOS and the CIHR Canadian HIV Trials Network (CTN). She has more than nine years’ data management experience in a contract research organization environment, where she was responsible for leading various clinical projects from study start-up until close-out.

Erica Jaaf, Data Manager

Ms. Erica Jaaf is a Data Manager for the CIHR Canadian HIV Trials Network at CHÉOS.

Hector Leon, Data Manager

Mr. Hector Leon is a Data Manager for the CIHR Canadian HIV Trials Network at CHÉOS.

Eisha Lehal, Data Operations Coordinator

Ms. Eisha Lehal is a Data Operations Coordinator.

Tong Zhu, Senior Data Manager

Tong Zhu

MD, PhD, M.HSc., IPMA Level-C

Dr. Tong Zhu is the Senior Data Manager for both CHÉOS and the CIHR Canadian HIV Trials Network. She has over 15 years’ working knowledge and experience in data management, clinical trials, preclinical research, and clinical practice.

In addition to her M.HSc. in Clinical Epidemiology from the University of British Columbia, Dr. Zhu holds a MD, Master in Pharmacology, and a PhD degree in Pathogen Biology from the Tianjin Medical University, China. Past activities include: practicing internal medicine, assisting in clinical trials, and involvement in new drug screening and action mechanism studies. She has worked with the Tasly Group (Tianjin, China) where she managed post-marketing surveillance and regulatory affairs projects, and supervised marketing authorization and registration. As of 2012, Dr. Zhu has been actively involved in various longitudinal studies and clinical trials to set up databases and perform a myriad of data management tasks.

Regulatory Affairs

Aidan Dennis, Project Coordinator

Aidan works on projects primarily with the project management team. He holds a Master of Public Health from the University of Victoria and has worked for such organizations as the College of Physical Therapists of BC and the Ministry of Health (Vancouver location) for his practicum. Aidan has volunteered for both Canadian and international organizations.

Dana Nohynek, Director, Regulatory Affairs and Quality Assurance


M.Sc., RAC

Ms. Nohynek joined the CIHR Canadian HIV Trials Network (CTN) at CHÉOS as Director of Regulatory Affairs and Quality Assurance in December 2013. She leads the regulatory and quality affairs functions within the CTN through the management of infrastructure and guidelines for creating, maintaining and enhancing administrative, regulatory, and quality assurance systems associated with conducting clinical trials. Ms. Nohynek has the overall responsibility of developing, facilitating, and executing regulatory strategies to support Network studies and to oversee the maintenance and compliance of quality systems.

She holds a B.Sc. (Honours) from the University of Waterloo (1998), a M.Sc. from the University of Toronto (2000), and a RAC certification (2006) granted by the Regulatory Affairs Professionals Society (RAPS). She has more than ten years of industry experience that includes the development of regulatory strategies throughout various phases of clinical investigation, extensive interactions with regulatory authorities, and preparation and submission of applications to health agencies in Canada, the United States, and Europe. In addition, she has implemented and maintained quality systems, prepared for and participated in agency audits, and developed internal training programs.

Ms. Nohynek has worked for small to mid-size biotech and medical device companies as well as with large pharma. She is an executive member of RAPS’ Southern B.C. chapter and a professional member of the Canadian Association of Professionals in Regulatory Affairs.

Research Staff

Mai Berger, Research Assistant

Ms. Mai Berger is a Research Assistant with Dr. Amy Salmon.

Glenyth Caragata, Evaluation Specialist

Glenyth Caragata is an Evaluation Specialist working with Amy Salmon.

Judy Chiu, Research Assistant



Ms. Judy Chiu is working with CHÉOS Scientists Drs. Nick Bansback and Aslam Anis.

Anne Chisholm, Research Assistant

Ms. Anne Chisholm is a Research Assistant working with Drs. Anita Palepu and Nadia Khan.

Scott Beaumont, Research Assistant

Scott Beaumont is a Research Assistant working with Dr. Eugenia Oviedo-Joekes.

Sameer Desai, Research Methodologist

Mr. Sameer Desai is a Research Methodologist at CHÉOS.

Saranee Fernando, Research Assistant

Ms. Saranee Fernando is a Research Assistant with Dr. Amy Salmon.

Megumi Iyar, Research Coordinator

Ms. Megumi Iyar is a Research Coordinator for the Eating Disorders Program at Providence Health Care with CHÉOS Scientist Dr. Josie Geller.

Sarah James, Research Assistant

Ms. James is a Research Assistant to Dr. Joseph Puyat. She holds a PhD in Occupational Therapy from the University of Queensland, Brisbane, Australia. Her professional experience has primarily been in occupational therapy, focused on the rehabilitation of children living with disabilities, and she has a strong research interest in mental health and psychology.

Kathy H. Li, Research Methodologist


Ms. Li is a Research Methodologist at CHÉOS. She also works as a Statistical Analyst at the Collaboration for Outcomes Research and Evaluation at the UBC Faculty of Pharmaceutical Sciences.

Lucia Milosavljevic, Research Coordinator

Ms. Lucia Milosavljevic works with CHÉOS Scientist Dr. Peter Dodek.

Erika Ono, Evaluation Specialist

Ms. Erika Ono is an Evaluation Specialist working with Amy Salmon.

Shoshana M. Parker, Clinical Research Coordinator

Shoshana Parker


Ms. Shoshana Parker is a Clinical Research Coordinator currently working on the study: Exploring host gene expression during post-exertional symptom flare in ME/CFS: An experimental approach, with Dr. David Patrick, University of British Columbia (UBC) School of Population and Public Health Director and study co-principal investigator. This study proposes to find the pathways activated when chronic fatigue syndrome patients experience a “flare” or “crash.”

Having been affiliated with CHÉOS in one way or another for the past 15 years, Ms. Parker has worked with several different researchers on many different grants and studies in fields of HIV, addictions medicine, and cardiology. One of her proudest accomplishments is setting up the clinic and writing the first software manual used for the North American Opiate Medication Initiative (NAOMI) trial, which took place from 2005 to 2008. She also coordinated and managed Health in the City, the CHÉOS conference on Urban Health Research, in January 2002, as well as the Bridges to Health Conference on optimal health research in the fall of 2002.

Ms. Parker holds a bachelor’s degree in Medical Laboratory Science from UBC, and a diploma in Medical Laboratory Technology from the Michener Institute in Toronto (formerly the Toronto Institute of Medical Technology).

Derek Ouyang, Research Assistant

Mr. Derek Ouyang is a Research Assistant at CHÉOS.

Javiera Pumarino, Research Assistant

Ms. Javiera Pumarino is working as a Research Assistant with CHÉOS Scientist Dr. Chris Richardson and the Inner City Youth Program. She splits her time between St. Paul’s Hospital and the Granville Youth Health Centre, and is completing her M.Sc. at the UBC School of Population and Public Health.

Verena Rossa, Research Assistant

Ms. Rossa is a Research Assistant to Dr. Chris Richardson. She is a current MSc in public health student at UBC where she is supervised by Dr. Anne Gadermann. Verena has a background as psychiatrist working with youth and young adults in a community-outreach setting in rural Switzerland.

Julie Sou, Research Assistant


M.Sc., B.Sc.

Ms. Julie Sou completed her M.Sc. at the School of Population and Public Health at UBC, where her thesis focused on social determinants of health and health access among female sex workers. She is currently working as a Research Assistant with Dr. Wei Zhang, Program Head of Health Economics at CHÉOS.

Joanna Zelichowska, Research Assistant

Ms. Joanna Zelichowska is a Research Assistant for the Eating Disorders Program at Providence Health Care with CHÉOS Scientist Dr. Josie Geller.

Software and Programming Staff

Statistical and Health Economics Staff

Daphne Guh, Statistician


Pharmacoeconomics Program

Research Interests

  • Biostatistics
  • Analysis of administrative databases
  • Modeling/costing of health care utilizations
  • Cost-effectiveness studies

Ms. Daphne Guh joined the Pharmacoeconomics program at CHÉOS after graduating with a Master of Science in Statistics from the University of British Columbia in late 1997. Over the years, she has worked with Centre Director Dr. Aslam Anis on several projects related to the provincial drug plan regulatory policies. Her research interests have been in biostatistics and issues/methods in analyzing administrative databases. Current research projects she is working on include the North American Opiate Medication Initiative (NAOMI) clinical trial, a British Columbia population-based rheumatoid arthritis database, and a project on the cost of obesity–burden of illness.

Terry Lee, Statistician

Terry Lee

PhD, M.Sc.

Dr. Terry Lee is a Statistician for the CIHR Canadian HIV Trials Network at CHÉOS. He received his PhD in Statistics from the University of Victoria and completed his postdoctoral research fellowship at Simon Fraser University in 2009. Part of his research involved collaborating with the Public Health Agency of Canada to develop and validate statistical tools for estimating hospital morbidity rate and cancer mortality rate in Canada. Dr. Lee’s work includes providing statistical consultation and analysis service to researchers in various areas, such as HIV/AIDS, obstetrics and gynaecology, gastroenterology, and critical care.

Tima Mohammadi, Health Economist

M.Sc., MA

Ms. Tima Mohammadi is a Health Economist with the pharmacoeconomics program of research, the Advancing Decision-Making in Medicine (DcIDE) group at CHÉOS.

She has a MA in Economics from Simon Fraser University and a M.Sc. in Socioeconomic Systems Engineering from the Institute for Management and Planning Studies (IMPS), Tehran. Tima has worked as a research analyst at Collaboration for Outcomes Research and Evaluation (CORE). She also held a faculty position at IMPS for seven years and conducted several research projects in economics evaluation and statistical analysis. Her research interests are focused on decision-analytic modeling and simulation, preference elicitation techniques (with a particular focus on using Bayesian methods in econometric analysis of discrete choice data), and health technology assessment.

Monica Norena, Statistician

Monica Norena

M.Sc., Critical Care Research

Hong Qian, Statistician

Hong Qian


Ms. Hong Qian joined CHÉOS in June 2008. She holds a M.Sc. in Statistics from McMaster University. With over 10 years’ professional experience as a statistician working for research organizations, including the B.C. Cancer Agency and Albert Einstein College of Medicine (New York), Ms. Qian provides statistical support to multiple projects—specifically in the areas of osteoarthritis, diabetes, and cardiovascular diseases. She also provides advice on study design and statistical analysis for various short-term research projects.

Huiying Sun, Statistician


PhD, M.Sc.
Pharmacoeconomics Program

Research Interests

  • Statistical modeling and computing
  • Cost-effectiveness analysis
  • HIV/AIDS epidemiology

Dr. Huiying Sun has a PhD in Mathematics from Harbin Institute of Technology, China, and a master’s degree in Statistics from University of British Columbia. She joined CHÉOS as a statistician in 2000.

Dr. Sun’s primary interest is in statistical modelling and computing. Her work includes statistical and mathematical consultation and data analysis. She has worked on cost-effectiveness studies of interventions for various diseases, such as hypertension, hip fraction, psoriasis, rheumatoid arthritis, and HIV/AIDS. The methods used in these analyses include the Markov model, Monte-Carlo simulation, probabilistic sensitivity analysis, and Bayesian meta-analysis. She is also interested in the research of HIV/AIDS epidemiology, especially health-related quality of life of HIV/AIDS patients.


Renée Cormier, Director – Grants and Strategic Research Communications

Ms. Renée Cormier joined CHÉOS in the fall of 2017 as our Director, Grants and Strategic Research Communications at CHÉOS. She works on grant facilitation and other projects for the team. Renée holds a PhD in Applied Social Psychology from the University of Windsor, and has experience working within both the academic and health authority sectors.

Sean Sinden, Communications and Knowledge Translation Officer

Mr. Sean Sinden joined the Communications Department in February of 2016. He holds a Master of Science degree from UBC and works concurrently with the CIHR Canadian HIV Trials Network (CTN).

Health research in the heart of Vancouver