RT Journal Article SR Electronic T1 Assessing safety culture: guidelines and recommendations JF Quality and Safety in Health Care JO Qual Saf Health Care FD BMJ Publishing Group Ltd SP 231 OP 233 DO 10.1136/qshc.2005.015180 VO 14 IS 4 A1 P Pronovost A1 B Sexton YR 2005 UL http://qualitysafety.bmj.com/content/14/4/231.abstract AB