1. Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University and Richmond VA Medical Center, Richmond, Virginia, USA
2. Microbiome Analysis Center, George Mason University, Manassas, Virginia
3. Departments of Physical Medicine and Rehabilitation, Psychiatry, & Neurology, VA Rocky Mountain Mental Illness Research Education and Clinical Center, Aurora, Colorado, and University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
4. Department of Psychiatry, Virginia Commonwealth University, Richmond, Virginia, USA