426. Effectiveness of Adding Gabapentin, on Pain Control After Orthopedic Surgeries, on Lower Extremity, in Patients Under Patient Controlled Epidural Analgesia (PCEA)
426. Effectiveness of Adding Gabapentin, on Pain Control After Orthopedic Surgeries, on Lower Extremity, in Patients Under Patient Controlled Epidural Analgesia (PCEA)