[1] Univ Washington, Dept Otolaryngol Head & Neck Surg, Seattle, WA 98195 USA
[2] Seattle Childrens Hosp, Div Pediat Otolaryngol, 4800 Sand Point Way NE,OA9-329, Seattle, WA 98105 USA
[3] Univ Kentucky, Dept Otolaryngol Head & Neck Surg, Lexington, KY USA
[4] Cincinnati Childrens Hosp Med Ctr, Div Otolaryngol Head & Neck Surg, Cincinnati, OH 45229 USA
[5] Cincinnati Childrens Hosp Med Ctr, Div Pulm Med, Cincinnati, OH 45229 USA
[6] Univ Cincinnati, Coll Med, Dept Otolaryngol Head & Neck Surg, Cincinnati, OH USA
[7] UT Southwestern, Childrens Hlth Dallas, Div Pediat Otolaryngol, Dept Otolaryngol Head & Neck Surg, Dallas, TX USA