TY - GEN AU - Hardy,P A TI - Extradural blood patch after an intradural injection SN - 0003-2409 PY - 1988///0601 KW - Blood KW - Headache KW - etiology KW - Humans KW - Injections, Spinal KW - adverse effects KW - Male N1 - Publication Type: Case Reports; Letter UR - https://doi.org/10.1111/j.1365-2044.1988.tb05567.x ER -