RT Journal Article SR Electronic T1 Misalignment of the Spinal Needle During the Spinal Epidural Combined Anesthesia JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 256 OP 257 DO 10.1136/rapm-00115550-199520030-00022 VO 20 IS 3 A1 I. Pedraza A1 M. I. Riobó A1 J. D. Diz A1 J. Alvarez YR 1995 UL http://rapm.bmj.com/content/20/3/256.2.abstract AB