[1] UNIV CALIF LOS ANGELES, SCH MED, DEPT SURG, DIV HEAD & NECK SURG, LOS ANGELES, CA 90024 USA
[2] UNIV SO CALIF, CHILDRENS HOSP, SCH MED, DEPT PEDIAT, LOS ANGELES, CA 90027 USA
[3] UNIV SO CALIF, CHILDRENS HOSP, SCH MED, DEPT OTOLARYNGOL HEAD & NECK SURG, LOS ANGELES, CA 90027 USA
[4] UNIV CALIF IRVINE, SCH MED, DEPT SURG, DIV HEAD & NECK SURG, IRVINE, CA 92717 USA