RT Journal Article SR Electronic T1 Carbon footprint of patient journeys JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 517 OP 517 DO 10.3399/bjgp13X673612 VO 63 IS 615 A1 Mike Clayton YR 2013 UL http://bjgp.org/content/63/615/517.3.abstract AB