1 Division of Gastroenterology and Hepatology, VA North Texas Healthcare System, 4500 S. Lancaster Rd 111B1, Dallas, TX, 75216, USA. Linda.Feagins@UTSouthwestern.edu.
2 Division of Gastroenterology and Hepatology, UT Southwestern Medical Center, Dallas, TX, USA. Linda.Feagins@UTSouthwestern.edu.
3 Department of Pharmacy, VA North Texas Healthcare System, Dallas, TX, USA.