1 Division of Gastroenterology, Department of Internal Medicine, Texas Tech University Health Sciences Center, 4800 Alberta Avenue, El Paso, TX, 79905, USA.
2 Division of Cardiology, Department of Internal Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA.
3 Division of Gastroenterology, Department of Internal Medicine, Texas Tech University Health Sciences Center, 4800 Alberta Avenue, El Paso, TX, 79905, USA. richard.mccallum@ttuhsc.edu.