I. Arevalo-Rodriguez,L. Munoz,N. Godoy-Casasbuenas,A. Ciapponi,J. J. Arevalo,S. Boogaard and M. R. I. Figuls. Needle gauge and tip designs for preventing post-dural puncture headache (PDPH). Cochrane Database of Systematic Reviews. 2017(4):10.1002/14651858.CD010807.pub2.
