[1] HOP ENFANTS MALAD,INST NECKER,FEDERAT GENET,CLIN CHIRURG INFANTILE,INSERM,U393,F-75743 PARIS 15,FRANCE
[2] HOP ENFANTS MALAD,INST NECKER,SERV NUTR & GASTROENTEROL PEDIAT,F-75743 PARIS 15,FRANCE
[3] HARVARD UNIV,SCH MED,DANA FARBER CANC INST,DEPT MED,DIV CANC EPIDEMIOL & CONTROL,BOSTON,MA 02115