RT Journal Article SR Electronic T1 January Focus JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 2 OP 2 DO 10.3399/bjgp09X394761 VO 59 IS 558 A1 David Jewell YR 2009 UL http://bjgp.org/content/59/558/2.abstract AB