RT Journal Article SR Electronic T1 Early diagnosis of lung cancer in people most at risk JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 572 OP 573 DO 10.3399/bjgp20X713537 VO 70 IS 701 A1 Sullivan, Frank M A1 van Beusekom, Mara YR 2020 UL http://bjgp.org/content/70/701/572.abstract AB