[1] CHILDRENS HOSP HLTH CTR, SAN DIEGO, CA USA
[2] LOUISIANA STATE UNIV, DEPT PEDIAT, BATON ROUGE, LA 70803 USA
[3] UNIV TEXAS, HLTH SCI CTR, DEPT PATHOL, DALLAS, TX 75235 USA
[4] UNIV TEXAS, HLTH SCI CTR, DEPT OBSTET & GYNECOL, DALLAS, TX 75235 USA
[5] UNIV TEXAS, HLTH SCI CTR, DEPT RADIOL, DALLAS, TX 75235 USA
[6] UNIV TEXAS, HLTH SCI CTR, DEPT OTOLARYNGOL, DALLAS, TX 75235 USA
[7] UNIV TEXAS, HLTH SCI CTR, DEPT PEDIAT, DALLAS, TX 75235 USA