RT Journal Article SR Electronic T1 Can Increasing Concentration of Epidural-PCA Fentanyl for Labor Improve Analgesia with Minimal Effect on the Neonate? JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 46 OP 46 DO 10.1136/rapm-00115550-199823031-00046 VO 23 IS Suppl 1 A1 Shaul Cohen A1 C. B. Pantuck A1 E. J. Pantuck A1 D. Amar A1 M. Stein A1 B. Hronkova YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/46.abstract AB