[1] Cleveland Clin, Head & Neck Inst, Dept Pediat Otolaryngol, Cleveland, OH USA
[2] Texas Childrens Hosp, Dept Pediat Otolaryngol, Houston, TX USA
[3] Baylor Coll Med, Sch Med, Dept Pediat Otolaryngol, Houston, TX USA
[4] Univ Calif San Francisco, Benioff Childrens Hosp, Dept Pediat Otolaryngol Head & Neck Surg, San Francisco, CA USA
[5] Harvard Med Sch, Massachusetts Eye & Ear Infirm, Dept Otolaryngol Head & Neck Surg, Boston, MA USA
[6] Univ Pittsburgh, Sch Med, UPMC Childrens Hosp Pittsburgh, Dept Otolaryngol, Pittsburgh, PA USA