[1] Univ Utah, Sch Med, Salt Lake City, UT USA
[2] Univ Utah, Sch Med, Dept Surg, Div Otolaryngol Head & Neck Surg, Salt Lake City, UT USA
[3] Univ Utah, Sch Med, Off Med Educ, Salt Lake City, UT USA
[4] Univ Utah, Dept Internal Med, Div Gen Internal Med, Salt Lake City, UT 84112 USA
[5] Univ Utah, Sch Med, Dept Pediat, Salt Lake City, UT USA
[6] Univ Utah, Sch Med, Dept Surg, Div Vasc Surg, 30 N 1900 E, Salt Lake City, UT 84132 USA