1. Division of Pediatric Hematology and Oncology, Department of Pediatrics, Inselspital—University Hospital of Bern, University of Bern, Bern, Switzerland.
2. Graduate School for Health Sciences, University of Bern, Bern, Switzerland.
3. Division of Pediatric Radiology, Department of Radiology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
4. VASCERN (European Network of rare vascular diseases) HCP (Health Care Provider) Freiburg-Hinterzarten, Germany.
5. Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
6. Vascular Biology Program, Department of Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
7. Foeldiclinic, Hinterzarten, Germany.
8. Division of Angiology, Swiss Cardiovascular Center, Inselspital—University Hospital of Bern, University of Bern, Bern, Switzerland.