RT Journal Article SR Electronic T1 Matters of Substance JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 3 OP 3 DO 10.3399/bjgp16X683017 VO 66 IS 642 A1 Roger Jones YR 2016 UL http://bjgp.org/content/66/642/3.abstract AB