[1] Washington Univ, Sch Med, 660 S Euclid Ave, St Louis, MO 63110 USA
[2] ENT Ctr Utah, 22 S 900 E, Salt Lake City, UT 84102 USA
[3] Washington Univ, Sch Med, Dept Med, 660 S Euclid Ave,Campus Box 8069, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, Dept Orthoped Surg, 660 S Euclid Ave,Campus Box 8233, St Louis, MO 63110 USA