Figure 5 shows the expression levels of these genes in Box-whisker plot. We can easily found that PIK3CA levels from common and blood groups of patients after admission to the paediatric intensive care unit had no obvious changes compared with controls, while expression of PIK3CA from Lymphocyte Source significantly decreased. According to the reports, NS is mainly caused by infections; however, there was no significant difference between controls and patients in immune response-related gene expression levels (Figures 5(d)–5(i)). Here, PIK3CA is linked to infection.