RT Journal Article SR Electronic T1 First and last JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 315 OP 315 DO 10.3399/bjgp12X649205 VO 62 IS 599 A1 Greenhalgh, Trisha YR 2012 UL http://bjgp.org/content/62/599/315.abstract AB