Johns Hopkins University, Baltimore, Maryland, United States
Friends Research Institute, Los Angeles, California, United States
Treatment Research Center, Burlington, Vermont, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
Johns Hopkins University (BPRU) Bayview Campus, Baltimore, Maryland, United States
Brown University School of Medicine, Providence, Rhode Island, United States
Washington DC VA, Washington, District of Columbia, United States
Friends Research Institute, Los Angeles, California, United States
Treatment Research Center, Burlington, Vermont, United States
Friends Research Institute, Los Angeles, California, United States