RT Journal Article SR Electronic T1 The symptom iceberg JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 224 OP 224 DO 10.3399/bjgp11X561339 VO 61 IS 584 A1 David Hannay YR 2011 UL http://bjgp.org/content/61/584/224.1.abstract AB