[1] UNIV MUNICH,DR VON HAUNERSCHEN KINDERSPITAL,D-80337 MUNICH,GERMANY
[2] UNIV CATHOLIQUE LOUVAIN,DEPT PAEDIAT,CLIN ST LUC,B-1200 BRUSSELS,BELGIUM
[3] UNIV CATHOLIQUE LOUVAIN,DEPT RADIOL,CLIN ST LUC,B-1200 BRUSSELS,BELGIUM
[4] UNIV CATHOLIQUE LOUVAIN,DEPT SURG,CLIN ST LUC,B-1200 BRUSSELS,BELGIUM