CGHE members span the University of Michigan and the globe, including faculty experts, research collaborators, scholars, and community partners. Search for Members with Keywords, Sponsors, Locations, or Categories + Rouba Ali-Fehmi, MD Bidirectional training, breast cancer, gynecologic malignancy Timothy (Tim) Hofer, MD, MS Quality improvement and healthcare delivery Sarah Hortsch, PhD, MSW, RN Evolutionary medicine and chronic disease David (Dave) Ripin, PhD Prevention and treatment of infectious diseases Sylvia Akpene Takyi, PhD Air Pollution, Environmental epidemiology, hygiene, nutrition, metabolic diseases, climate change