“…Inclusion criteria were to fulfill the classification criteria for CFS and FM that had been diagnosed in the previous 2-3 years based on the current diagnostic criteria (2,5). Exclusion criteria for patients were acute infection diseases in the previous 3 weeks; past/present neurological, psychiatric, metabolic (diabetes), autoimmune diseases, allergy-related, dermal or chronic inflammatory disorders, undesired habits (e.g., smoking, alcohol abuse), oral diseases (e.g., periodontitis), medical conditions that required glucocorticoids treatment, use of statins, analgesics, antioxidants therapy or antidepressant/anxiolytics drugs, past or current substance abuse or dependence, as well as pregnancy or current breastfeeding.…”