[1] SUNY Downstate Med Ctr, Dept Otolaryngol Head & Neck Surg, 450 Clarkson Ave,Box 126, Brooklyn, NY 11203 USA
[2] Univ Calif San Francisco, Dept Otolaryngol Head & Neck, 2233 Post St,Rm 357, San Francisco, CA 94115 USA
[3] Albert Einstein Coll Med, Univ Hosp, Montefiore Med Ctr, Dept Otorhinolaryngol Head & Neck Surg, 3400 Bainbridge Ave,Greenberg Med Arts Pavil, Bronx, NY 10467 USA