RT Journal Article SR Electronic T1 Methadone keeps people alive JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 607 OP 608 DO 10.3399/bjgp11X601271 VO 61 IS 591 A1 Stephen Willott A1 Euan Lawson YR 2011 UL http://bjgp.org/content/61/591/607.abstract AB