[1] Christian Duve Inst Cellular Pathol, Lab Human Mol Genet, B-1200 Brussels, Belgium
[2] Univ Catholique Louvain, B-1200 Brussels, Belgium
[3] Ctr Hosp Chretiens, Dept Pediat, Liege, Belgium
[4] Univ Catholique Louvain, Ctr Vasc Anomalies, Div Plast Surg, B-1200 Brussels, Belgium