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 + Andrew Chang, MD Thoracic surgery with a particular focus on thoracic oncology Timothy (Tim) Hofer, MD, MS Quality improvement and healthcare delivery Joseph (Joe) Kolars, MD, MACP Health professions education, health systems strengthening and capacity sharing among healthcare workers