lakhe, G., Adhikari, K. M., Khatri, K., Maharjan, A., Bajracharya, A., & Khanal, H. (2017). Prevention of Shivering during Spinal Anesthesia: Comparison between Tramadol, Ketamine and Ondansetron. Journal of Nepal Medical Association, 56(208), 395–400. https://doi.org/10.31729/jnma.3377