RT Journal Article SR Electronic T1 Understanding safety and performance in the cardiac operating room: from ‘sharp end’ to ‘blunt end’ JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 807 OP 809 DO 10.1136/bmjqs-2012-001135 VO 21 IS 10 A1 Ken Catchpole A1 Douglas Wiegmann YR 2012 UL http://qualitysafety.bmj.com/content/21/10/807.abstract AB