RT Journal Article SR Electronic T1 Unusual chest radiograph finding plombs old depths JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 143 OP 143 DO 10.3399/bjgp14X677572 VO 64 IS 620 A1 Nyla Khan YR 2014 UL http://bjgp.org/content/64/620/143.abstract AB