1. Center for Vascular Medicine Hamburg Germany
2. LY.SEARCH Institute for Basic Lymphology Research Düsseldorf Germany
3. SRH University of Applied Health Sciences Karlsruhe Germany
4. European Center for Lymphology, Földiklinik Hinterzarten Germany
5. Center for Obesity and Metabolic Surgery University Medical Center Freiburg Freiburg Germany
6. Office for Internal Medicine and Vascular Diseases Halle Germany
7. Venenpraxis Wunstorf Wunstorf Germany
8. Office for Dermatology and Venereology, Allergology Phlebology Berlin Germany
9. Private Office for Dermatology & Phlebology Bonn Germany
10. Dermatology Bad Soden Bad Soden Germany
11. Private Office for Dermatology and Vascular Medicine Recklinghausen Germany
12. Department of Dermatology, Venereology and Allergology, Catholic Hospital Bochum, St. Josef Hospital, University Medical Center Ruhr University Bochum Bochum Germany
13. Institute for Clinical and Functional Anatomy Medical University of Innsbruck Innsbruck Austria