OLFM4 and congenital secretory chloride diarrhea 1: Based on the neutrophil gene expression patterns reported in literature, and log-fold values in our microarray data set, 5 differentially expressed genes from ACLF versus CLD, were selected for validation using qRT-PCR which included ELANE, MPO, CD177, OLFM4 and OLAH (Fig. 2D).