1. Department of Emergency Medicine, Warren Alpert Medical School of Brown University, Providence, RI, USA
2. Center for Addiction Medicine and Policy, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
3. Department of Epidemiology, School of Public Health of Brown University, Providence, RI, USA
4. Department of Biomedical Informatics, School of Medicine, Emory University, Atlanta, GA, USA