University of Washington, Seattle, Washington, United States
Children's Hospital Medical Center, Cincinnati, Cincinnati, Ohio, United States
University of Florida, Gainesville, Florida, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
University of New Mexico School of Medicine, Albuquerque, New Mexico, United States
UNC Center for Functional GI Motility Disorders, Chapel Hill, North Carolina, United States
Centre for Addiction and Mental Health, Clark Site, Toronto, Ontario, Canada
University of Miami Hospital, Miami, Florida, United States
University of Nebraska Medical Center, Omaha, Nebraska, United States
Oregon Health Sciences University, Portland, Oregon, United States
Tufts University School of Medicine, Boston, Massachusetts, United States
Emory University School of Medicine, Atlanta, Georgia, United States
Keck School of Medicine at U.S.C., Los Angeles, California, United States
U California Medical Center, San Francisco, California, United States
Emory University, Atlanta, Georgia, United States
University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
University of Miami School of Medicine, Miami, Florida, United States
University of Hawaii, John A. Burns School of Medicine, Honolulu, Hawaii, United States