RT Journal Article SR Electronic T1 The influence of maternal posture on spread of 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 18 OP 18 DO 10.1136/rapm-00115550-198813011-00018 VO 13 IS Suppl 1 A1 M. T. Pitkänen A1 H. Paatero A1 P. H. Rosenberg YR 1988 UL http://rapm.bmj.com/content/13/Suppl_1/18.abstract AB