2.5. Laboratory Tests
POLAND
Biological material was collected from patients at two time points—visit 1 and control (after 5 weeks). Venous blood was collected in EDTA tubes (Sarstedt, Bionovo, Legnica, Poland), centrifuged (3500 rpm for 10 min), and then the plasma and morphos fractions were separated in each eppendorf. Stool was collected using a stool sample kit (Kałszyk, Poland). The biological material was stored at −80 °C until laboratory analyses were performed.