[1] Georgetown Univ, Sch Med, Washington, DC USA
[2] Georgetown Univ, MedStar Georgetown Univ Hosp, Dept Otolaryngol Head & Neck Surg, Sch Med, Washington, DC USA
[3] Natl Inst Deafness & Other Commun Disorders, Auditory Dev & Restorat Program, NIH, Bethesda, MD 20892 USA
[4] Natl Inst Deafness & Other Commun Disorders, Otolaryngol Surg Scientist Program, NIH, Porter Neurosci Res Ctr, 35 Convent Dr,Room 1F-226, Bethesda, MD 20892 USA
[5] Natl Inst Deafness & Other Commun Disorders, Auditory Dev & Restorat Program, NIH, Porter Neurosci Res Ctr, 35 Convent Dr,Room 1F-226, Bethesda, MD 20892 USA