RT Journal Article SR Electronic T1 Illegal drug use in the age of ageing JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 481 OP 482 DO 10.3399/bjgp10X514710 VO 60 IS 576 A1 Caryl Beynon A1 Gerry Stimson A1 Euan Lawson YR 2010 UL http://bjgp.org/content/60/576/481.abstract AB