[1] Cedars Sinai Med Ctr, Los Angeles, CA 90048 USA
[2] Alamo Med Res, San Antonio, TX USA
[3] Virginia Mason Med Ctr, Digest Dis Inst, Seattle, WA 98101 USA
[4] Univ Colorado Denver & Hosp, Aurora, CO USA
[5] Kansas City Gastroenterol & Hepatol, Kansas City, MO USA
[6] Abbott, Abbott Pk, IL USA