Brigham & Women's Hospital, Boston, Massachusetts, United States
Torrance Memorial Medical Center, Torrance, California, United States
Sunnybrook Heath Sciences Center, Toronto, Ontario, Canada
Massachusetts General Hospital, Boston, Massachusetts, United States
Piedmont Heart Institute, Atlanta, Georgia, United States
Emory Heart & Vascular Center, Atlanta, Georgia, United States
Hoxworth Blood Center, Cincinnati, Ohio, United States
Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States
Torrance Memorial Medical Center, Torrance, California, United States
Piedmont Heart Institute, Atlanta, Georgia, United States
Hackensack University Medical Center, Hackensack, New Jersey, United States
Sanford Clinic, Sioux Falls, South Dakota, United States
Lahey Clinic, Burlington, Massachusetts, United States
Morrision Vein Institute, Scottsdale, Arizona, United States
Mackay Center for Vein Treatment and Laser Therapy, Palm Harbor, Florida, United States
Pottstown Memorial Hospital, Pottstown, Pennsylvania, United States
Lake Washington Vascular Surgery, Bellevue, Washington, United States
The Heart and Vascualr Institute of Florida, Safety Harbor, Florida, United States
Charleston Area Medica Center (CAMC), Charleston, West Virginia, United States
WakeMed, Raleigh, North Carolina, United States