Thapa, A. S., and R. K. Yadav. “Efficacy of Pregabalin As Preemptive Analgesic in Laparoscopic Cholecystectomy”. Birat Journal of Health Sciences, vol. 5, no. 3, Dec. 2020, pp. 1166-70, doi:10.3126/bjhs.v5i3.33687.