title: Commentary on Sacks-Davis et al. (2016): Quantifying the risk environment-effect modification and precision population health.
authors.affiliation: Department of Epidemiology, Brown School of Public Health, Providence, RI, USA.
authors.forename: Geetanjoli
authors.initials: G
authors.lastname: Banerjee
authors.affiliation: Department of Epidemiology, Brown School of Public Health, Providence, RI, USA. brandon_marshall@brown.edu.
authors.forename: Brandon D L
authors.initials: BD
authors.lastname: Marshall
mesh_terms: D000701:Analgesics, Opioid; D006801:Humans; D009293:Opioid-Related Disorders; D000075485:Population Health; D015819:Substance Abuse, Intravenous
chemical_list: D000701:Analgesics, Opioid
keywords: Effect modification; geography; hepatitis C virus; prescription opioid injection; risk environment; substance use