CRP and immune system disorder: Combined MeanDecreaseAccuracy and MeanDecreaseGini (Figure 2A), lymphocyte (%), neutrophil count, C-reactive protein (CRP), lactic acid dehydrogenase (LDH), and α-hydroxybutyric dehydrogenase (α-HBDH) were selected for developing an optimized model, where lymphocyte (%) is an immune disorder indicator (Trowell, 1947), neutrophil count represents infection (Xie et al., 2020), CRP represents inflammatory response (Vermeire et al., 2004; Sabrina et al., 2012), and both LDH and α-HBDH represent tissue lesions (Sanwald and Kirk, 1966; Kishaba et al., 2014).