Acknowledgments
Five of the authors of this publication are members of the Vascular
Anomalies Working Group (VASCA WG) of the European Reference Network for
Rare Multisystemic Vascular Diseases (VASCERN) - Project ID: 769036.
This work was supported in part by the Center for Vascular Anomalies,
Freiburg Center for Rare Diseases. F.G.K. was supported by an
EXCEL-Fellowship of the Faculty of Medicine, University of Freiburg,
funded by the Else–Kröner–Fresenius–Stiftung.