[1] Univ Pittsburgh, Dept Med, Pittsburgh, PA USA
[2] Univ Pittsburgh, Dept Surg, Pittsburgh, PA USA
[3] VA Pittsburgh Healthcare Ctr, Ctr Hlth Equ Res & Promot, Pittsburgh, PA USA
[4] Oregon Hlth & Sci Univ, Sch Nursing, Portland, OR 97201 USA
[5] Univ Calif Los Angeles, David Geffen Sch Med, Div Digest Dis, Los Angeles, CA 90095 USA
[6] Univ Calif Los Angeles, David Geffen Sch Med, Div Gen Internal Med & Hlth Serv Res, Los Angeles, CA 90095 USA
[7] Massachusetts Gen Hosp, Dept Med, Liver Ctr Div Gastroenterol, Boston, MA 02114 USA
[8] Harvard Med Sch, Boston, MA 02115 USA
[9] Einstein Healthcare Network, Dept Med, Philadelphia, PA USA
[10] Icahn Sch Med Mt Sinai, Brookdale Dept Geriatr & Palliat Med, New York, NY 10029 USA
[11] James J Peters Vet Affairs Med Ctr, Geriatr Res Educ & Clin Ctr, Bronx, NY USA
[12] Baylor Coll Med, Dept Med, Sect Gastroenterol & Hepatol & Hlth Serv Res, McNair Bldg,Suite A10-198,7200 Cambridge St,BCM, Houston, TX 77030 USA
[13] VA HSR&D Ctr Innovat Qual Effectiveness & Safety, Houston, TX USA
[14] Michael E DeBakey VA Med Ctr, Houston, TX USA