[1] Harvard Univ, Sch Med, Div Otolaryngol, Massachusetts Eye & Ear Infirm, Boston, MA 02114 USA
[2] So Calif Permanente Med Grp, Los Angeles Med Ctr, Div Head & Neck Surg, Los Angeles, CA 90027 USA
[3] Harvard Univ, Sch Med, Div Otol, Massachusetts Eye & Ear Infirm, Boston, MA 02114 USA
[4] ENT & Allergy Associates, Englewood, NJ USA
[5] New York State Amer Program, Sackler Sch Med, New York, NY USA
[6] Harvard Univ, Sch Med, Div Gen Otolaryngol & Endocrine Surg, Massachusetts Eye & Ear Infirm, Boston, MA 02114 USA