HLA-C and Hashimoto thyroiditis: Hashimoto’s thyroiditis (HT), also known as chronic lymphocytic thyroiditis and Hashimoto’s disease, is an autoimmune thyroid disease (AITD) with a complex etiopathology, which includes genetic (e.g., major histocompatibility complex (MHC) genes) and environmental factors, such as past infections, medications, and smoking, and the level of microelements, such as iodine, iron, and selenium [1,2].