Hritz, I., and P. Hegyi. “Early Achievable Severity (EASY) Index for Simple and Accurate Expedite Risk Stratification in Acute Pancreatitis”. Journal of Gastrointestinal and Liver Diseases, Vol. 24, no. 2, Mar. 2020, pp. 177-82, doi:10.15403/jgld.2014.1121.242.easy.