[1] UNIV HEIDELBERG,KINDERKLIN,D-6900 HEIDELBERG,FED REP GER
[2] UNIV FREIBURG,MED KLIN,D-7800 FREIBURG,FED REP GER
[3] FREE UNIV BERLIN,KLINIKUM CHARLOTTENBURG,D-1000 BERLIN 19,FED REP GER
[4] UNIV BONN,INST MED STAT,D-5300 BONN,FED REP GER
[5] HOP HAUTPIERRE,F-67200 STRASBOURG,FRANCE
[6] MED HSCH HANNOVER,KINDERKLIN,D-3000 HANNOVER 61,FED REP GER