[1] Charite, Inst Med Genet, D-13353 Berlin, Germany
[2] Katholieke Univ Leuven Hosp, Ctr Human Genet, B-3000 Louvain, Belgium
[3] AZ St Lucas, B-8310 Brugge, Belgium
[4] Maastricht Univ Ctr, Dept Clin Genet, NL-6200 Maastricht, Netherlands
[5] Clin Univ St Luc, Ctr Genet Humaine, B-1200 Brussels, Belgium
[6] Univ Childrens Hosp, D-04103 Leipzig, Germany
[7] Univ Klinikum Rostock, Abt Med Genet, D-18057 Rostock, Germany
[8] Med Univ Lubeck, Dept Pediat, D-23538 Lubeck, Germany
[9] Berlin Brandenburg Ctr Regenerat Therapies BCRT, D-13353 Berlin, Germany
[10] Max Planck Inst Mol Genet, D-14195 Berlin, Germany