[1] Columbia Univ, NY Presbyterian Hosp, Childrens Hosp, Div Pediat Otolaryngol, New York, NY USA
[2] Childrens Hosp Kings Daughter, Eastern Virginia Med Sch, Dept Otolaryngol Head & Neck Surg, Norfolk, VA USA
[3] Univ Washington, Childrens Hosp, Div Pediat Otolaryngol, Seattle, WA 98195 USA
[4] Univ Washington, Dept Otolaryngol Head & Neck Surg, Reg Med Ctr, Seattle, WA 98195 USA
[5] Childrens Hosp, Div Pediat Otolaryngol, Dallas, TX USA
[6] Cornell Univ, NY Presbyterian Hosp, New York Weill Cornell Med Ctr, Div Pediat Otolaryngol, New York, NY USA
[7] Johns Hopkins Univ, Dept Otolaryngol Head & Neck Surg, Baltimore, MD USA
[8] Columbia Univ, NY Presbyterian Hosp, Dept Surg, New York, NY USA