RT Journal Article SR Electronic T1 Spinal headaches: bevel orientation not an important factor JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 32 OP 32 DO 10.1136/rapm-00115550-199015011-00032 VO 15 IS Suppl 1 A1 Culling, Robert D. A1 Rubin, Alex A1 Culclasure, John A1 Hansen, Timothy A1 Epps, Jerry YR 1990 UL http://rapm.bmj.com/content/15/Suppl_1/32.abstract AB