1 Vascular Anomalies Unit, Department of Dermatology, University Clinic of Navarra, Madrid, Spain.
2 Vascular Anomalies Unit, Department of Dermatology, University Hospital Ramon y Cajal, Madrid, Spain.
3 Vascular Anomalies Unit, Department of Pediatric Surgery, University Hospital La Paz, Madrid, Spain.
4 Vascular Malformations Section and Clinical Genetics Section, Institute of Medical and Molecular Genetics, INGEMM-IdiPAZ, Hospital Universitario La Paz, Madrid, Spain.