RT Journal Article SR Electronic T1 September Focus JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 634 OP 634 DO 10.3399/bjgp09X454016 VO 59 IS 566 A1 David Jewell YR 2009 UL http://bjgp.org/content/59/566/634.abstract AB