Timothy Niessen, MD

Dr. Katherine Hoops is an attending physician in the Pediatric Intensive Care Unit. Dr. Hoops’ research is focused on the prevention of firearm injury and violence. She is a core faculty member in the Johns Hopkins Bloomberg School of Public Health’s Center for Gun Violence Solutions, where she leads the Clinical Programs and Practice Team. She conducts research investigating how clinicians and health systems can prevent youth violence and injury while promoting healing and resilience through community-engaged, trauma-sensitive care. She received her undergraduate degree from Florida State University in Tallahassee, Florida. She earned her medical degree at the University of Miami Miller School of Medicine in Miami, Florida. She completed a Master’s in Public Health concentrating on Health Policy and Management in injury and violence prevention at the Johns Hopkins Bloomberg School of Public Health. She completed her residency training in Pediatrics at the University of Alabama Birmingham before coming to Johns Hopkins University School of Medicine to complete her fellowship in Pediatric Critical Care Medicine. In 2024, she completed her Juris Doctor Degree at the Georgetown University Law Center..

Dr. Redgrave received his B.A. from St. John's College and his M.D. from the Johns Hopkins University School of Medicine. He completed an internship in general internal medicine at Johns Hopkins Bayview Medical Center and psychiatric residency at Johns Hopkins Hospital, where he served as chief resident. Dr. Redgrave is an attending psychiatrist with clinical expertise in eating disorders. His research focuses on neuroimaging of anorexia using MRI techniques, eating disorder treatment outcomes; he is also developing with basic science collaborators in our department techniques to use imaging to study animal models of eating disorders.Dr. Redgrave was faculty member in the Colleges Advisory Program, where he mentored medical students and taught clinical skills from 2009-2013. He was Associate Director for Residency Education from 2012-2013 and has been Director for Residency Education from 2013.

Dr. Cheng-Ying Ho is an Associate Professor of Pathology at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include neuromuscular pathology, pediatric neuropathology, and neuropathology of infectious diseases. Dr. Ho serves as the Deputy Director for the Neuropathology Fellowship Program.Dr. Ho received her medical degree from National Taiwan University and her Ph.D. in Pathobiology from Columbia University. She completed Anatomic Pathology and Neuropathology combined residency and fellowship training at the Johns Hopkins Hospital. Dr. Ho joined the faculty at Johns Hopkins University School of Medicine in 2022. Dr. Ho’s research interests include the pathogenesis and treatment of sensory neuropathy, with a focus on the impact of the skin microenvironment on the development of diabetic neuropathy. Her laboratory uses diverse approaches to study the role of skin-derived signaling molecules in the maintenance of the cutaneous sensory nerve fibers. Her research also involves development of novel therapeutics for diabetic neuropathy.