Social Emergency Medicine Research

Our Team

Our Team

Principal Investigator

Dr. Samuels-Kalow is an Associate Professor at Harvard Medical School (HMS), an attending physician in emergency medicine and pediatric emergency medicine at Massachusetts General Hospital (MGH), and the Vice-Chair for Research in the Department of Emergency Medicine at MGH. She completed undergraduate studies in Mathematics at the University of Chicago, spending her senior year in at the University of Cambridge (UK) where she earned an MPhil in Epidemiology (2004). She earned an MD at the Yale School of Medicine in 2008 and completed residency training at the Harvard Affiliated Emergency Medicine Residency in 2012.

Following residency, Dr. Samuels-Kalow completed a combined pediatric emergency medicine and K12 research fellowship at the Children’s Hospital of Philadelphia, earning a Masters of Science in Health Policy Research from the University of Pennsylvania. In 2016, she returned to MGH. Since then, she has built an NIH-funded clinical research program focusing on developing interventions to reduce disparities in emergency care, and improving the quality of care provided to underserved families. Her current work focuses on examining the association between hospital factors and equitable high-quality care for children in general emergency departments (R01, NICHD), and the development and testing of novel strategies for identifying and addressing unmet social and dental needs among ED patients (UH3, NIDCR).

Research Scientist

Stephanie Loo, PhD, MSc is a Research Scientist at Emergency Medicine Network (EMNet), Massachusetts General Hospital. She is an experienced health services and social care researcher, focusing on qualitative methods and implementation science evaluating the intersection of social determinants of health and clinical informatics in multiple healthcare settings such as emergency care, primary care, pediatric hematology and breast oncology. Additionally, she has consulting experience conducting and developing research and training researchers on qualitative and community-based participatory research, including projects in Cameroon, India, and Liberia.

Her past work includes mixed-methods research in HIV, cross-cultural leadership during mass casualty incidents in the US and Europe, sexual gender minorities and forcibly displaced communities. She previously worked in quality improvement and clinical informatics using national clinical data databases as Project Director of the Informatics Team at The Fenway Institute in Boston, MA. She has worked as a consultant for The World Bank, Brigham and Women’s Hospital, Harvard T.H. Chan School of Public Health, and Boston University School of Public Health.


Carlos Camargo is a Professor of Emergency Medicine, Medicine, and Epidemiology at Harvard University, and the Conn Chair in Emergency Medicine at Massachusetts General Hospital. He founded and leads the Emergency Medicine Network (EMNet) an international research collaboration with ~250 hospitals and a mission to advance public health objectives through diverse projects in emergency care. EMNet focuses on respiratory/allergy disorders, health services research, and social emergency medicine. Dr Camargo also works on the role of nutrition in respiratory/allergy disorders, both in cohort studies and in randomized controlled trials. He is past president of the American College of Epidemiology, and has worked on several U.S. guidelines, including those on diet, asthma, and food allergy. Dr Camargo has compiled >1,300 publications, with an H-index of 159.

Rebecca E. Cash, PhD, NRP, FAEMS is an Assistant Investigator at Massachusetts General Hospital (MGH), Assistant Professor of Emergency Medicine at Harvard Medical School, and a faculty member of the Emergency Medicine Network (EMNet) at MGH. As part of her doctoral training in public health and epidemiology at The Ohio State University, Dr. Cash completed an Emergency Medical Service (EMS) Research Fellowship at the National Registry of Emergency Medical Technicians. She has over a decade of experience working in EMS, first working on an ambulance as an emergency medical technician and paramedic and now as an epidemiologist and health services researcher. Dr. Cash’s work focuses on describing and understanding the EMS workforce and systems of emergency and prehospital care, especially for high-risk, low frequency, time-critical conditions.

Danielle Cullen is an assistant professor of pediatrics and pediatric emergency medicine at Children’s Hospital of Philadelphia (CHOP) and the Perelman School of Medicine at the University of Pennsylvania, Associate Director for Implementation Science at CHOP’s Clinical Futures, faculty member at PolicyLab, and a senior fellow of the University of Pennsylvania Leonard Davis Institute of Health Economics. She is also course director for Master Level Introduction to Implementation Science at the University of Pennsylvania. Dr. Cullen’s research focuses on socio-economic health disparities, in particular childhood food insecurity. Her long-term goal is to improve health equity among socially disadvantaged children through the development of effective, acceptable, and feasible strategies to identify social need and improve family engagement with desired resources. She is dedicated to community involvement in research and programmatic design, and leveraging methods from Community-Based Participatory Research and Implementation Science to enhance reach and sustainability of developed programs. Her current interdisciplinary research portfolio includes: mixed-methods evaluations of social assessments, locations and referral processes; a hybrid implementation-effectiveness study of the USDA’s summer food service program across five CHOP clinical settings; and a qualitative evaluation of low-income families’ experiences with a clinically-based subsidized organic produce box program. In addition to her research, Dr. Cullen is a member of the advisory board for the hunger pillar of CHOP’s Healthier Together initiative, the Center for Health Equity, and CHOP’s social care governance committee. She serves on multiple city-wide committees, including as co-chair of the food insecurity workgroup for the multi-institutional COACH (Collaborative Opportunities to Advance Community Health) initiative to address social determinants of health in southeastern Pennsylvania.

Samaa Kemal, MD, MPH is an early career pediatric emergency medicine clinician investigator at Lurie Children’s Hospital. Her long-term goal is to develop and implement novel and effective solutions to prevent violent injuries in children. She is a tireless advocate for children’s health with multiple research and advocacy initiatives focused on the intersection of violence and health equity in children. She is the Associate Medical Director of her institution’s emerging hospital-based violence intervention program through which she leads the effort to provide child victims of violence with holistic, trauma-informed care to assist in their recovery and support their long-term physical and mental health. Through this program, Dr. Kemal will study interventions to decrease repeat injury rates and improve mental health outcomes for youth with violent injuries.

Regan Marsh, MD, MPH is an Assistant Professor of Emergency Medicine at Harvard Medical School and the Brigham and Women’s Hospital. She is the Associate Medical Director for Health Equity at the Mass General Brigham and a Senior Strategic Advisor for Partners In Health. Her work focuses on advancing equity in healthcare delivery and emergency care systems through a social justice lens.

Dr. Salhi is an attending physician and health services research in the Department of Emergency Medicine. She completed residency training at the University of Michigan where she stayed on to complete fellowship training as part of the National Clinician Scholars Program. Her work focuses on the manifestations of structural racism/inequities in the delivery of acute, time-sensitive care, particularly for traumatic injuries and cardiovascular emergencies.

Dr. Leon Sanchez is currently the Chief of Emergency Medicine at the MGB Brigham and Women’s Faulkner Hospital. Prior to that he was the Vice Chair for Network Operations at Beth Israel Deaconess Medical Center. He is an Associate Professor of Emergency Medicine at Harvard Medical School with over 100 peer reviewed publications. He is an accomplished physician executive with over 20 years of healthcare experience. He is a nationally recognized expert in the field of Emergency Medicine Operations and has lectured both nationally and internationally.

Areas of recent focus include operational improvement, patient flow and throughput optimization, queuing, and schedule optimization. His clinical experience spans a large variety of Emergency Departments both in terms of size and resources. His research innovations have been implemented in academic and non academic settings.

Dr. Sanchez received his Doctor of Medicine from Columbia University Vagelos College of Physicians and Surgeons. He earned his Masters of Public Health from Columbia University and completed his Emergency Medicine residency training at Jacobi Medical Center/Albert Einstein College of Medicine. He has been practicing in Massachusetts since 2001.

Lisa Simon, MD, DMD is a physician, dentist, and health services researcher. She has been involved in the implementation of medical-dental integration projects in both the primary care, dental, and hospital setting and has published more than 65 peer-reviewed articles on oral health policy and the separation of medicine and dentistry in high-impact journals including the New England Journal of MedicineHealth Affairs, and the Journal of the American Dental Association. She was named the 2020 “Woman to Watch” by the Lucy Hobbs Taylor Award for women in dentistry, and a 2022 Stat “Wunderkind” for her research and commitment to equity. A proud safety net clinician, she has practiced both medicine and dentistry in federally qualified health centers in the greater Boston area.  She is a faculty member in the Division of General Internal Medicine and Primary Care at Brigham and Women’s Hospital, Harvard Medical School, and the Harvard School of Dental Medicine.

Kori S. Zachrison MD, MSc is Associate Professor of Emergency Medicine at Harvard Medical School and Massachusetts General Hospital (MGH). She is also Chief of the Mass General Brigham Division of Health Services Research. Dr. Zachrison trained in Emergency Medicine at Northwestern University in Chicago and completed the Robert Wood Johnson Foundation Clinical Scholars Program at the University of Michigan prior to joining the faculty at MGH. Her federally-funded research program focuses on systems of emergency care delivery, using stroke as a model condition. She is particularly interested in strategies to improve access to care for vulnerable populations, including tools such as telehealth.

Clinical Research Coordinators