1. Cardiovascular Research Foundation, New York, NY, USA
2. The First Affiliated Hospital of Dalian Medical University, Dalian, China
3. Columbia University Medical Center, New York, NY, USA
4. Heart and Vascular Center, Florida Hospital Heartland Medical Center, Sebring, FL, USA
5. Vascular Institute of Atlanta, GA, USA
6. Arizona Heart Hospital and Arizona Heart Institute, Phoenix, AZ, USA
7. Tennova Healthcare, Turkey Creek Medical Center, Knoxville, TN, USA
8. St John Hospital and Medical Center, Detroit, MI, USA
9. Lankenau Medical Center, Wynnewood, PA, USA