Belbase, N. P., S. . Khatiwada, N. . Koirala, H. Prasad Upadhyay, S. Bhujel, and B. Shah. “Evaluation of POSSUM Score for Outcome Prediction in Patients Undergoing Major Gastrointestinal Surgery in Population of Central Nepal”. Journal of College of Medical Sciences-Nepal, vol. 18, no. 2, June 2022, pp. 116-24, doi:10.3126/jcmsn.v18i2.46335.