TY - GEN TI - On demand epidural fenatanyl SN - 0003-2409 PY - 1992///0121 KW - Analgesia, Epidural KW - Analgesia, Patient-Controlled KW - Fentanyl KW - administration & dosage KW - Humans KW - Time Factors N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1111/j.1365-2044.1991.tb09865.x ER -