[1] Massachusetts Eye & Ear Infirm, Dept Otolaryngol, Boston, MA 02114 USA
[2] Harvard Univ, Sch Med, Dept Otol & Laryngol, Boston, MA USA
[3] Massachusetts Gen Hosp, Dept Pathol, Boston, MA 02114 USA
[4] Naval Med Ctr, Dept Otolaryngol Head & Neck Surg, San Diego, CA USA