RT Journal Article SR Electronic T1 ASRA Regional Anesthesia Quiz JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 46 OP 46 DO 10.1136/rapm-00002370-198101000-00018 VO 6 IS 1 A1 P. P. Raj YR 1981 UL http://rapm.bmj.com/content/6/1/46.abstract AB