1. Quarterly update on the Preventing Wrong-Site Surgery Project: improving, but still room for perfection Publication: [Harrisburg, Pa.] : Pennsylvania Patient Safety Authority, c2009 Subject(s): Medical Errors -- prevention & controlSurgical Procedures, Operative -- statistics & numerical dataAnesthesia, Local -- statistics & numerical dataPatient Identification SystemsPreoperative Care -- methodsSafety Management -- methodsSpine -- surgeryHumansUnited States