[1] Cedars Sinai Med Ctr, Ctr Outcomes Res & Educ CS CORE, Div Hlth Serv Res, Dept Med, Los Angeles, CA 90048 USA
[2] Erasmus Univ, Div Hlth Technol Assessment, Erasmus Sch Hlth Policy & Management, Rotterdam, Netherlands
[3] Univ Southern Calif, Gehr Family Ctr Hlth Syst Sci, Div Geriatr Hosp Palliat & Gen Internal Med, Dept Med,Keck Sch Med, Los Angeles, CA 90007 USA
[4] Dartmouth Hitchcock Inflammatory Bowel Dis Ctr, Sect Gastroenterol & Hepatol, Lebanon, NH USA
[5] Gastroenterol Associates Inc, Providence, RI USA
[6] Brown Univ, Dept Med, Div Gastroenterol, Alpert Med Sch, Providence, RI USA
[7] Cedars Sinai Med Ctr, Inflammatory Bowel Dis Ctr, Div Gastroenterol, Los Angeles, CA 90048 USA
[8] Crohns & Colitis Fdn, New York, NY USA
[9] Univ Southern Calif, Div Gastrointestinal & Liver Dis, Keck Sch Med, Los Angeles, CA 90007 USA