1. Adventist Heart and Vascular Institute Adventist St. Helena Hospital St. Helena California
2. Bradenton Cardiology Center Bradenton Florida
3. Division of Angiology Medical University Graz Graz Austria
4. Lifespan Cardiovascular Institute The Miriam Hospital Providence Rhode Island
5. Division of Angiology, Department of Internal Medicine, Neurology and Dermatology University Hospital Leipzig Leipzig Germany