University of Pittsburgh - Heart and Vascular Medicine Institute, Pittsburgh, Pennsylvania, United States
University of Southern California - Keck Medical Center, Los Angeles, California, United States
Saint Vincent Hospital and Health Services, Indianapolis, Indiana, United States
Cleveland Clinic, Cleveland, Ohio, United States
VA Healthcare System of Greater Los Angeles, Los Angeles, California, United States
University of Arizona, Tucson, Arizona, United States
Medical Faculty Associates, George Washington University, Washington, District of Columbia, United States
Mayo Clinic - Jacksonville, Jacksonville, Florida, United States
St. Vincent's Lung, Sleep, and Critical Care Specialists, Jacksonville, Florida, United States
Beijing Chao-Yang Hospital, Beijing, China
Peking Union Medical College Hospital, Beijing, China
Fu Wai Hospital, Beijing, China
Beijing Chao-Yang Hospital, Beijing, China
Xiangya Hospital Centre South University, Changsha, China
Fu Wai Hospital, Beijing, China
University of Chicago, Chicago, Illinois, United States
Duke University Medical Center, Durham, North Carolina, United States
Dana Farber Cancer Institute, Boston, Massachusetts, United States