RT Journal Article SR Electronic T1 Hearing crackles: why all GPs should pass PACES JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 474 OP 475 DO 10.3399/bjgp16X686857 VO 66 IS 650 A1 Rachel Brettell YR 2016 UL http://bjgp.org/content/66/650/474.abstract AB