[1] Univ Toronto, St Josephs Hosp, Dept Otolaryngol Head & Neck Surg, 30 Queensway,Sunny Side West,Su 230, Toronto, ON M6R 1B5, Canada
[2] Johns Hopkins Univ, Johns Hopkins Outpatient Ctr, Dept Otolaryngol Head & Neck Surg, 601 N Caroline St,6th Floor, Baltimore, MD 21287 USA
[3] Sarasota Mem Hlth Care Syst Multidisciplinary Thyr, 1901 Floyd St,Ste304, Sarasota, FL 34239 USA