RT Journal Article SR Electronic T1 519. The Relationship Between the Sleep Quality and Perception of Pain Intensity Among Elderly Patients Undergoing Orthopaedic Surgeries JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP e180 OP e180 DO 10.1136/rapm-00115550-200809001-00348 VO 33 IS Suppl 1 A1 Margaret, N. YR 2008 UL http://rapm.bmj.com/content/33/Suppl_1/e180.1.abstract AB