lakhe, Gajal, Krishna Adhikari, Kiran Khatri, Anil Maharjan, Akriti Bajracharya, and Himdip Khanal. “Prevention of Shivering During Spinal Anesthesia: Comparison Between Tramadol, Ketamine and Ondansetron”. Journal of Nepal Medical Association 56, no. 208 (December 31, 2017): 395-400. Accessed August 17, 2019. http://jnma.com.np/jnma/index.php/jnma/article/view/3377.