[1] TOHOKU UNIV,SCH MED,DEPT PEDIAT,SENDAI,MIYAGI 980,JAPAN
[2] CHILDRENS HOSP PHILADELPHIA,DEPT PEDIAT,PHILADELPHIA,PA 19104
[3] CHU VAUDOIS,CENT CHIM CLIN LAB,CH-1011 LAUSANNE,SWITZERLAND
[4] EMORY UNIV,SCH MED,DEPT PEDIAT,ATLANTA,GA 30322
[5] CHILDRENS HOSP,SHEFFIELD S10 2TH,S YORKSHIRE,ENGLAND
[6] UNIV IOWA HOSP & CLIN,DEPT PEDIAT,IOWA CITY,IA 52242
[7] DUKE UNIV,MED CTR,DEPT PEDIAT,DURHAM,NC 27710