RT Journal Article SR Electronic T1 Vertical versus horizontal integration JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 694 OP 694 DO 10.3399/bjgp09X454205 VO 59 IS 566 A1 Wilfrid Treasure YR 2009 UL http://bjgp.org/content/59/566/694.1.abstract AB