[1] Phoenix Childrens Hosp, Div Otolaryngol, Phoenix, AZ USA
[2] Creighton Univ, Sch Med, Phoenix, AZ USA
[3] Univ Arizona, Phoenix Coll Med, Phoenix, AZ USA
[4] Phoenix Childrens Hosp, Dept Pulmonol, Phoenix, AZ USA
[5] Dell Childrens Hosp, Div Otolaryngol, Austin, TX USA
[6] Phoenix Childrens Hosp, Div Otolaryngol, 1919 E Thomas Rd, Phoenix, AZ 85016 USA