Lab Members


Co-Principal Investigator

Co-Principal Investigator
Sarah Francis, MA, LSSBB
Administrative Services Associate

Sarah Francis is a Lean Six Sigma Black Belt who initiates projects to improve the systems and processes within the Department of Surgery and Interventional Services. In this role, Francis identifies opportunities to improve communication and streamline processes by analyzing data from a number of sources including direct observation, the electronic medical record and stakeholder interviews. She seeks to implement long-term solutions that are designed with and for the process owners and informed by best practices. Her past work has focused on improving patient flow, standardizing roles and responsibilities, and evaluating the effect technology has on in-person communication. Francis also manages a leadership in healthcare improvement program, a nine-month quality improvement and leadership development course for residents and fellows.

Eric Ley, MD
Medical Director, Surgical Critical Care Unit

Eric Ley, MD, is a surgeon who has worked on multiple projects that utilize human factors to improve the delivery of trauma and intensive unit care. In addition, his translational benchtop research investigates the catecholamine response after trauma and the role of beta blockers in traumatic brain injury. Ley is the medical director of the Cedars-Sinai Surgical Critical Care Unit and program director for the Trauma and Critical Care Fellowship.

Daniel Shouhed, MD
Faculty, Minimally Invasive Surgery

Daniel Shouhed, MD, is a surgeon in minimally invasive, bariatric and foregut procedures at Cedars-Sinai. He completed his surgical training at Cedars-Sinai and his fellowship training in metabolic, endocrine and minimally invasive surgery at Mount Sinai Hospital in New York, New York. Currently, Shouhed’s research focuses on human factors in surgery and the role practitioners’ emotional intelligence plays in patient outcomes and litigation. He has presented his research at several national surgical meetings and has authored publications in prestigious peer-reviewed journals, including JAMA SurgeryJournal of the American College of Surgeons and World Journal of Surgery.

Jennifer Anger, MD
Associate Professor of Urology and Associate Director of Urological Research

Jennifer Anger, MD, received her bachelor's degree in integrative biology from the University of California, Berkeley, her master's degree from the UCLA School of Public Health and earned her medical degree at the Keck School of Medicine, University of Southern California. Her research has focused on the quality of care for women with urinary incontinence and pelvic prolapse, including the safety and efficiency of robotic-assisted surgery.

Contact the Gewertz & Cohen Lab

825 N. San Vicente Blvd.,
Third Floor
Los Angeles, CA  90069