RT Article T1 Prevalence and correlates for nonmedical use of prescription opioids among urban and rural residents JF Drug and alcohol dependence VO 127 IS 1/3 SP 156 OP 162 A1 Wang, Karen H. A2 Fiellini, David A. A2 Becke, William C. LA English YR 2013 UL https://krimdok.uni-tuebingen.de/Record/1912661071 DO 10.1016/j.drugalcdep.2012.06.027