William F. Armstrong
Author William F Armstrong MD
Professor of Medicine, Director, Echocardiography Laboratory, University of Michigan Health System, Ann Arbor, MI
Author Thomas Ryan MD
Associate Professor of Medicine, Duke University Hospital, Durham, NC
William F. Armstrong
Author William F Armstrong MD
Professor of Medicine, Director, Echocardiography Laboratory, University of Michigan Health System, Ann Arbor, MI
Author Thomas Ryan MD
Associate Professor of Medicine, Duke University Hospital, Durham, NC
