IL4 and atopic eczema: In the multiple regression analysis, the following independent variables were selected: 1) four inflammatory cytokine signals (IL-4, IL-6, IL-8, and IL-17); 2) birth season, which was significantly associated with the IFSAT scores; and 3) family history of atopic dermatitis, which was not significantly associated with the IFSAT scores but was speculated to influence skin problems in infants.