IL4 and schizophrenia: Data from 62 studies, analyzed IFN-γ, IL-4, IL-2, soluble IL-2 receptor (sIL-2R), IL-1β, IL-1 receptor antagonist (IL-1RA), TNF-α, IL-6, soluble IL-6 receptor (sIL-6R), and IL-10 in schizophrenia.