Zainal, R., Nugraha Heryadi, Agustina Br Haloho and Erial Bahar 2021. Preemptive Ketorolac is as Effective as Oxycodone Decreasing Plasma Cortisol Levels in Patients Undergoing Spinal Anesthesia. Journal of Anesthesiology and Clinical Research. 2, 1 (Dec. 2021), 159-169. DOI:https://doi.org/10.37275/jacr.v2i1.146.