[1] UNIV TEXAS,DEPT MED,HOUSTON,TX
[2] NATL CHILDRENS HOSP,SAN JOSE,COSTA RICA
[3] UNIV TEXAS,HLTH SCI CTR,SW MED SCH,PEDIAT INFECT DIS SECT,DALLAS,TX 75235
[4] UNIV MARYLAND,SCH MED,CTR VACCINE DEV,BALTIMORE,MD 21201
[5] WELLCOME RES LABS,RES TRIANGLE PK,NC 27709
[6] MAHIDOL UNIV,RAMATHIBODI MED SCH,DEPT PATHOL,BANGKOK 10700,THAILAND
[7] WELLCOME RES LABS,RES TRIANGLE PK,NC 27709
[8] ROBERTO RIO PEDIAT HOSP,CENT LAB,SANTIAGO,CHILE
[9] ESCOLA PAULISTA MED,DEPT MICROBIOL,BR-04023 SAO PAULO,SP,BRAZIL