RT Article T1 Do medical marijuana laws increase marijuana use? Replication study and extension JF Annals of epidemiology VO 22 IS 3 SP 207 OP 212 A1 Harper, Sa,' Strumpf A2 Kaufman, Jay S. LA English YR 2012 UL https://krimdok.uni-tuebingen.de/Record/1912520362 DO 10.1016/j.annepidem.2011.12.002