Table 1.

Suggested exclusion criteria.

Age <18 years or >65 years

-Body Mass Index (BMI) >30kg/m2

-Metabolic syndrome

-Moderate to severe undernutrition

-History of antibiotics use in the last 6 months

-Diarrhea within the last 3-6 months

-History of Clostridioides difficile colitis

-Immune disorder or use of immunosuppressive medications

-History of drug use or other recent risk factor for HIV (Human Immunodeficiency Virus) or viral hepatitis

-History of travel to a tropical region in the last 3 months

-Any gastrointestinal illness (IBD, Inflammatory Bowel Disease; IBS, Irritable Bowel Syndrome, gastrointestinal malignancy, or major surgery) or complaints

-History of chronic pain syndrome (fibromyalgia, chronic fatigue syndrome)

-Neurologic or neurodevelopmental disorders

-History of malignancy