RT Journal Article SR Electronic T1 Professor Jan Van Es JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 587 OP 587 DO 10.3399/bjgp08X319846 VO 58 IS 553 A1 John Horder YR 2008 UL http://bjgp.org/content/58/553/587.abstract AB