Abstract
1Sepulveda Ambulatory Care Center, Veterans Affairs Greater Los Angeles Healthcare System, North Hill, CA, USA; 2David Geffen School of Medicine at UCLA, Los Angeles, CA, USA; 3Palo Alto VAMC; 4Stanford University School of Medicine, Palo Alto, CA, USA; 5Gastroenterology, Sacramento VAMC, VANCHCS, Mather, CA, USA; 6UC Davis Medical Center, Sacramento, CA, USA; 7Carl T. Hayden VAMC, Phoenix, AZ (current affiliation 8Mayo Medical School, Mayo Clinic, Scottsdale, AZ)
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