5. Eight tubes (SST- phenolsulfotransferase platelet survival time (PST)- and ethylenediaminetetraacetic acid (EDTA) tubes), à 6 ml, to collect serum, plasma and blood cells. Feces sampling for microbiota analyses. Urine sampling during the night. All biological material will be stored at -20 ◦C or -80◦ C for later analyses, or analyzed at once (Hb, leukocytes, thrombocytes, CRP, electrolytes, liver enzymes, lipids, bleeding status, glomerular filtration rate (GFR), insulin, fp-glucose, HbA1c and thyroid-stimulating hormone (TSH), cobalamin, folate and routine urine analyses incl microalbuminuria).