 Those who meet study criteria will be provided with a collection kit and instructed on appropriate fecal sample collection. Participants will also be given a lab requisition and instructed to have blood drawn at a local lab. This blood sample will examine serum levels of IL-6, IL-1β, IL-10, IFNγ, TNF- α and CRP. Liquid Chromatography-Mass Spectrometry LC-MS will be used for a kynureninetryptophan analysis. 