RT Journal Article SR Electronic T1 The Bending and Stiffness of Epidural Catheters JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 359 OP 359 DO 10.1016/S1098-7339(03)00187-1 VO 28 IS 4 A1 Clive B. Collier YR 2003 UL http://rapm.bmj.com/content/28/4/359.1.abstract AB