[1] Univ Michigan, Dept Internal Med, Ann Arbor, MI 48109 USA
[2] Ann Arbor VA Med Ctr, Vet Affairs Ctr Clin Management Res, Ann Arbor, MI USA
[3] Univ Michigan, Dept Internal Med, Div Gastroenterol, Ann Arbor, MI 48109 USA
[4] Univ N Carolina, Ctr Esophageal & Swallowing Disorders, Div Gastroenterol, Chapel Hill, NC 27515 USA
[5] Clark Profess Pharm, Ann Arbor, MI USA
[6] Chapel Hill Compounding Pharm, Chapel Hill, NC USA