1. G. Oppenheimer Center for Neurobiology of Stress and Resilience, University of California, Los Angeles, California, USA
2. UCLA Microbiome Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
3. Division of Gastroenterology, Hepatology and Parenteral Nutrition, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA
4. The Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
5. David Geffen School of Medicine, University of California, Los Angeles, California, USA
6. Department of Surgery, UCLA Center for Obesity and METabolic Health (COMET), Los Angeles, California, USA
7. UCLA Center for Human Nutrition, University of California, Los Angeles, California, USA