CRP and systemic inflammatory response syndrome: Various scoring systems have been developed to assess the severity and prognosis of AP, such as Ranson criteria, acute physiologic assessment and chronic health evaluation II (APACHE II) score, Bedside Index for Severity in Acute Pancreatitis (BISAP) score, systemic inflammatory response syndrome (SIRS), hematocrit (Hct), and C‐reactive protein (CRP).