Suchodolska, M., B. Świerczyńska, A. Undziakiewicz, K. Smoluchowski, and M. Sekuła. “Risk Factors for Gallbladder Cancer”. Journal of Education, Health and Sport, vol. 10, no. 9, Sept. 2020, pp. 487-93, doi:10.12775/JEHS.2020.10.09.058.