RT Journal Article SR Electronic T1 A Prospective Study Evaluating the Optimal Volume of Autologous Blood Injectate Used in the Treatment of Post Dural Puncture Headaches JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 37 OP 37 DO 10.1136/rapm-00115550-199823031-00037 VO 23 IS Suppl 1 A1 S. C. Sayson A1 M. H. Boin YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/37.abstract AB