1. Human Molecular Genetics, de Duve Institute, University of Louvain, Brussels, Belgium (A.Q., L.M.B., M.V.), University of Louvain, Brussels, Belgium (M.V.).
2. Centre for Vascular Anomalies, Division of Plastic Surgery, Cliniques Universitaires Saint-Luc Brussels, Belgium (E.S., L.M.B., M.V.)
3. Institut Roi Albert II, Department of Medical Oncology, Cliniques Universitaires Saint-Luc, Brussels, Belgium (E.S.)
4. VASCERN VASCA European Reference Centre Cliniques Universitaires Saint-Luc, Brussels, Belgium (E.S., L.M.B., M.V.).
5. University of Louvain, Brussels, Belgium (M.V.).
6. Walloon Excellence in Life Sciences and Biotechnology (WELBIO), University of Louvain, Brussels, Belgium (M.V.).