[1] Univ Calif San Francisco, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Dept Med, Div Hosp Med, San Francisco, CA 94143 USA
[3] Vizient, Ctr Adv Analyt & Informat, Irving, TX USA
[4] Rush Univ, Dept Hlth Syst Management, Chicago, IL 60612 USA
[5] Univ Calif San Francisco, Dept Med, Div Gastroenterol & Hepatol, San Francisco, CA 94143 USA