Fecal examinations Each participant will collect a stool sample before the baseline tests and once before the long-term follow-up tests. At home, one feces sample must be stored at room temperature and one in the freezer and when arrived at the CRU, the feces will be stored at -20⁰C and -80⁰C, respectively. Stool samples will be stored for possible analysis of biomarkers, including calprotectin. Since it is becoming increasingly clear that the gut microbiome might be involved in the development of obesity and T2DM and chronic kidney disease (CKD) disease, the investigators will also store and analyze feces for microbial content.