TY - JOUR T1 - Sphenopalatine ganglion block for postdural puncture headache in the patient with challenging spinal anatomy JF - Regional Anesthesia & Pain Medicine JO - Reg Anesth Pain Med SP - 1115 LP - 1115 DO - 10.1136/rapm-2021-102473 VL - 46 IS - 12 AU - Danielle Levin AU - Shaul Cohen AU - Gilbert J Grant Y1 - 2021/12/01 UR - http://rapm.bmj.com/content/46/12/1115.2.abstract N2 - ER -