[1] Univ Toledo, Med Ctr, Dept Surg, Toledo, OH 43606 USA
[2] Univ Kentucky, Chandler Med Ctr, Div Otolaryngol Head & Neck Surg, Lexington, KY USA
[3] St Louis Univ, Sch Med, Cardinal Glennon Childrens Med Ctr, St Louis, MO USA
[4] Long Isl Coll Hosp, Brooklyn, NY 11201 USA
[5] Suny Downstate Med Ctr, Dept Otolaryngol, Brooklyn, NY 11203 USA
[6] Cincinnati Childrens Hosp, Med Ctr, Dept Pediat, Cincinnati, OH USA
[7] Baystate Childrens Hosp, Dept Pediat, Springfield, MA USA
[8] Eastern Virginia Med Sch, Dept Otolaryngol, Norfolk, VA 23501 USA
[9] Childrens Hosp Philadelphia, Div Otolaryngol, Philadelphia, PA 19104 USA
[10] Univ Penn, Sch Med, Dept Anesthesiol & Crit Care, Philadelphia, PA 19104 USA
[11] Sleep Apnea Surg Ctr, Palo Alto, CA USA
[12] Jamess Project, Wayne, PA USA
[13] Albany ENT & Allergy Serv PC, Albany, NY USA
[14] Adv Pediat, Vienna, VA USA
[15] Univ Wisconsin, Dept Pediat, Sch Med & Publ Hlth, Madison, WI USA
[16] Qualis Hlth, Seattle, WA USA
[17] Cochrane ENT Disorders Grp, Oxford, England
[18] Amer Acad Otolaryngol Head & Neck Surg Fdn, Alexandria, VA USA