RT Journal Article SR Electronic T1 Books: A Realist Theory of Science JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 539 OP 539 DO 10.3399/bjgp18X699665 VO 68 IS 676 A1 Alistair Appleby YR 2018 UL http://bjgp.org/content/68/676/539.abstract AB