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Kim, Sang Ho, Soon Im Kim, Si Young Ok, Sun Young Park, Mun-Gyu Kim, Se-Jin Lee, Jung Il Noh, Hea Rim Chun, and Haejin Suh. Opioid Sparing Effect of Low Dose Ketamine in Patients With Intravenous Patient-controlled Analgesia Using Fentanyl After Lumbar Spinal Fusion Surgery. The Korean Society of Anesthesiologists, 2013.

Kim, Sang Ho, et al. Opioid Sparing Effect of Low Dose Ketamine in Patients With Intravenous Patient-controlled Analgesia Using Fentanyl After Lumbar Spinal Fusion Surgery. The Korean Society of Anesthesiologists, 2013.