TY - JOUR AU - Ball, J E; Osbourne, J; Jowett, S TI - Quality improvement programme to achieve acceptable colonoscopy completion rates: prospective before and after study JO - BMJ VL - 329 PY - 2004 DO - 10.1136/bmj.329.7467.665 SP - 665 EP - 667 N1 - et al. ER -