Postdural Puncture Headache after Continuous Spinal Anesthesia with 18-Gauge and 20-Gauge Needles
Richard I. Mazze, Masahiko Fujinaga
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1993, 18 (1) 47-51; DOI: 10.1136/rapm-00115550-199318010-00010