Incidence of postdural puncture headache and backache, and success rate of dural puncture: comparison of two spinal needle designs.
Pan PH, Fragneto R, Moore C, Ross V. Incidence of postdural puncture headache and backache, and success rate of dural puncture: comparison of two spinal needle designs. South Med J. 2004 Apr; 97(4):359-63.