Institution: | (1) Department of Medicine, VA San Diego Healthcare System and University of California, San Diego, CA, USA;(2) Laboratory Medicine, VA San Diego Healthcare System and University of California, San Diego, CA, USA;(3) Family Medicine, VA San Diego Healthcare System and University of California, San Diego, CA, USA;(4) Gastroenterology (111D), VA San Diego Healthcare System, 3550 La Jolla Village Drive, San Diego, CA 92161, USA; |