[1] Children's Hospital of Cologne,
[2] Amsterdamerstrasse 59,undefined
[3] 50735 Cologne,undefined
[4] Germany e-mail: e.korsch@uni-koeln.de Tel.: +49-221-89075596; Fax: +49-221-89075330,undefined
[5] Department of Paediatrics,undefined
[6] University of Liege,undefined
[7] Belgium,undefined
[8] Genetics Department,undefined
[9] Hopital Necker-Enfants Malades,undefined
[10] Paris,undefined
[11] France,undefined
[12] Genetics Department,undefined
[13] Hopital Nord,undefined
[14] St. Etienne,undefined
[15] France,undefined