[1] Univ Alabama Birmingham, Div Gastroenterol & Hepatol, 1808 7th Ave South,BDB 391, Birmingham, AL USA
[2] Univ Alabama Birmingham, Dept Internal Med, Tinsley Harrison Internal Med Residency Program, 1720 2nd Ave South,BDB 327, Birmingham, AL 35294 USA
[3] Univ Alabama Birmingham, 1802 6th Ave South, Birmingham, AL 35233 USA
[4] Univ Alabama, Dept Med, Montgomery Internal Med Residency Program, 2055 E South Blvd,Suite 200, Montgomery, AL 36116 USA