[1] Harvard Med Sch, Brigham & Womens Hosp, Dept Otolaryngol, Boston, MA USA
[2] Univ Colorado, Sch Med & Publ Hlth, Dept Otolaryngol, Aurora, CO USA
[3] Virginia Mason Med Ctr, Dept Otolaryngol, Seattle, WA 98101 USA
[4] Beth Israel Deaconess Med Ctr, Dept Emergency Med, Boston, MA 02215 USA
[5] Univ Michigan, Dept Otolaryngol, Ann Arbor, MI 48109 USA
[6] Univ Arizona, Barrow Neurol Inst, Phoenix, AZ USA
[7] Univ Arizona, Coll Med, Phoenix, AZ USA
[8] Intermt Hearing & Balance Ctr, Salt Lake City, UT USA
[9] Vestibular Disorders Assoc, Portland, OR USA
[10] Ear Nose & Throat Specialists Northern Virginia P, Arlington, VA USA
[11] Alabama Hearing & Balance Associates Inc, Birmingham, AL USA
[12] Univ Cent Florida, Coll Med, Dept Otolaryngol Head & Neck Surg, Orlando, FL 32816 USA
[13] Univ Louisville, Sch Publ Hlth & Informat Sci, Dept Hlth Management & Syst Sci, Louisville, KY 40292 USA
[14] Univ Louisville, Sch Publ Hlth & Informat Sci, Dept Family & Geriatr Med, Louisville, KY 40292 USA
[15] Univ Oklahoma, Hlth Sci Ctr, Dept Otorhinolaryngol, Oklahoma City, OK USA
[16] Northwestern Univ, Dept Otolaryngol Head & Neck Surg, Feinberg Sch Med, Chicago, IL 60611 USA
[17] Univ Alabama Birmingham, Dept Otolaryngol, Birmingham, AL USA
[18] Amer Acad Otolaryngol Head & Neck Surg Fdn, Alexandria, VA USA