1. Center for Vein Disease, Englewood Hospital and Medical Center, Englewood, NJ, USA
2. Surgery, Stony Brook University The State University of New York, Stony Brook, NY, USA
3. Guy's and St Thomas' Hospitals, London, UK
4. Northwell Health, Great Neck, NY, USA
5. Weill Cornell Comprehensive Vein Care, Weill Cornell Medicine, New York, NY, USA