Institution: | (1) Department of Medicine, William Beaumont Army Medical Center, 79920-5001 El Paso, TX, USA;(2) Nuclear Medicine Service, William Beaumont Army Medical Center, 79920-5001 El Paso, TX, USA;(3) Gastroenterology Service, William Beaumont Army Medical Center, 79920-5001 El Paso, TX, USA;(4) the Department of Radiology, William Beaumont Army Medical Center, 79920-5001 El Paso, TX, USA |