RT Journal Article SR Electronic T1 The process of screening flexible sigmoidoscopy: the patient's perspective JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 639 OP 640 VO 49 IS 445 A1 Michael Gray A1 David Snadden YR 1999 UL http://bjgp.org/content/49/445/639.abstract AB