RT Article T1 The epidemiology of substance use and disorders among middle aged and elderly community adults: National Survey on Drug Use and Health JF American journal of geriatric psychiatry VO 17 IS 3 SP 237 OP 245 A1 Blazer, Dan G. 1944- A2 Wu, Li-Tzy LA English YR 2009 UL https://krimdok.uni-tuebingen.de/Record/1912538261 DO 10.1097/JGP.0b013e318190b8ef