IL18 and psychiatric disorder: In the future would be interesting to characterize a higher number of homeless people and expand the inflammatory cytokine panel, quantifying other molecules that have been reported in chronic diseases that are prevalent in the homeless population, such as cardiovascular (IL-38, IL-18, α-amilase) (49) infectious diseases (IL-12 and TGF-α) (19) and mental disorders (IL-18, C- reactive protein) (26).