[1] East Tennessee State Univ, Div Hosp Med, Dept Pediat, Johnson City, TN 37614 USA
[2] Univ Colorado, Hosp Med, Sch Med, Aurora, CO USA
[3] Yale New Haven Hlth Syst, New Haven, CT USA
[4] Creighton Univ, Internal Med, Sch Med, Omaha, NE USA
[5] Univ Kentucky, Internal Med & Gastroenterol, Sch Med, Lexington, KY USA
[6] Univ Calif Riverside, Sch Med, Riverside, CA USA
[7] Univ Utah, Gen Internal Med, Sch Med, Salt Lake City, UT USA