Midwest Cardiology Research Foundation, Columbus, Ohio, United States
Medical College of Pennsylvania, Philadelphia, Pennsylvania, United States
Guthrie Clinic, LTD, Sayre, Pennsylvania, United States
Central Cardiology Medical Clinic, Bakersfield, California, United States
Saint Louis University, St. Louis, Missouri, United States
University of California-San Diego, San Diego, California, United States
Local Institution, Milwaukee, Wisconsin, United States
Local Institution, San Antonio, Texas, United States
Local Institution, Wallingford, Connecticut, United States
Local Institution, Bellevue, Washington, United States
Local Institution, Seattle, Washington, United States
Local Instituton, Hoffman Estates, Illinois, United States
Local Institution, Milwaukee, Wisconsin, United States