RT Journal Article SR Electronic T1 Authors' response JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 733 OP 734 DO 10.1136/bmjqs-2011-000196 VO 20 IS 8 A1 Callen, Joanne A1 Georgiou, Andrew A1 Li, Julie A1 Westbrook, Johanna I YR 2011 UL http://qualitysafety.bmj.com/content/20/8/733.2.abstract AB