RT Journal Article SR Electronic T1 Side-effects During Patient-assisted Epidural Analgesia JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 258 OP 260 DO 10.1136/rapm-00115550-199520030-00024 VO 20 IS 3 A1 Chrubasik, Sigrun A1 Friedrich, Gerhard A1 Chrubasik, Joachim YR 1995 UL http://rapm.bmj.com/content/20/3/258.abstract AB