1. Heart and Vascular Institute, Henry Ford Health, Detroit, MI, USA
2. Vein Specialists, Fort Myers, FL, USA
3. Shanghai Vascular Aging and Cardio-Cerebrovascular Disease Council, Shanghai, China
4. Division of Cardiology, Loma Linda University Medical Center, Loma Linda, CA, USA
5. Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
6. Department of Vascular Medicine, Cleveland Clinic, Weston, FL, USA
7. Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA