RT Journal Article SR Electronic T1 25 gauge Whitacre versus 27 gauge Quincke needle for spinal anesthesia JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 118 OP 118 DO 10.1136/rapm-00115550-199823031-00118 VO 23 IS Suppl 1 A1 Wijnand A.M. de Ronde A1 Rudolf Stienstra A1 Tim A. Jonker A1 Anton G.L. Burm A1 Jack W. van Kleef YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/118.abstract AB