CRP and COVID-19: The neural network (Kriegeskorte and Golan, 2019) with two hidden layers (the first layer has 128 neurons and the second layer has eight neurons) also illustrated that RF model based on the combination of lymphocyte (%), neutrophil, LDH, CRP, and α-HBDH could best predict the outcome of COVID-19 patients (Supplementary Figure S5).