. . . . . "injection of an anesthetic substance into the epidural space of the spinal cord in order to produce epidural anesthesia"@en-us . "0"^^ . "0"^^ . "00322778-n"^^ . . . "100322778"^^ . "epidural injection"^^ . "100308366"@en-us . "epidural injection"@en-us . . .