1. School of Public Health, Brown University, Providence, Rhode Island, USA
2. Department of Neuroscience, Brown University, Providence, Rhode Island, USA
3. Harm Reduction Innovation Lab, Rhode Island Hospital, Providence, Rhode Island, USA
4. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
5. Department of Epidemiology, School of Public Health, Brown University, Providence, Rhode Island, USA
6. Division of General Internal Medicine, The Department of Medicine, Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA