[1] CHILDRENS MERCY HOSP,KANSAS CITY,MO 64108
[2] UNIV CALIF LOS ANGELES,SCH MED,LOS ANGELES,CA 90024
[3] CHILDRENS HOSP LOS ANGELES,LOS ANGELES,CA
[4] UNIV COLOGNE,OTORHINOLARYNGOL,D-5000 COLOGNE 41,FED REP GER
[5] UNIV GIESSEN,KINDER POLIKLIN,D-6300 GIESSEN,FED REP GER
[6] GLASGOW INST RADIOTHERAPEUT & ONCOL,GLASGOW,SCOTLAND
[7] UNIV ALABAMA,BIRMINGHAM,AL
[8] CHILDRENS HOSP PHILADELPHIA,PHILADELPHIA,PA
[9] IST GIANNINA GASLINI,I-16148 GENOA,ITALY
[10] CTR LEON BERARD,F-69373 LYON 2,FRANCE
[11] INST GUSTAVE ROUSSY,F-94805 VILLEJUIF,FRANCE
[12] CHILDRENS HOSP DENVER,DENVER,CO
[13] ST JUDE CHILDRENS RES HOSP,MEMPHIS,TN 38101
[14] UNIV TENNESSEE,CTR HLTH SCI,COLL MED,MEMPHIS,TN 38163
[15] NEW YORK MED COLL,VALHALLA,NY 10595
[16] INST CHILD HLTH,LONDON WC1N 1EH,ENGLAND
[17] ROYAL MARSDEN HOSP,DEPT PEDIAT ONCOL,LONDON,ENGLAND
[18] HOSP SICK CHILDREN,LONDON WC1N 3JH,ENGLAND
[19] CLIN UNIV ST LUC,B-1200 BRUSSELS,BELGIUM
[20] UNIV TSUKUBA,SAKURA,IBARAKI 30031,JAPAN
[21] KYOTO PREFECTURAL UNIV MED,KYOTO 602,JAPAN
[22] NATL CHILDRENS HOSP,TOKYO 154,JAPAN
[23] OKLAHOMA CHILDRENS MEM HOSP,OKLAHOMA CITY,OK 73104
[24] EMMA KINDERZIEKANHUIS,AMSTERDAM,NETHERLANDS