TY - RPRT TI - Does a bloody tap prevent postdural puncture headache? AU - K J Khan AU - P C Stride AU - G M Cooper PY - 1993 DO - 10.1111/j.1365-2044.1993.tb07132.x UR - https://pubmed.ncbi.nlm.nih.gov/8346782/ ID - 8346782 ER -