Laboratory examination methods include general clinical tests, which include a general blood test, a general urine test, and a stool test. Laboratory methods of examination also include biochemical methods of examination, during which the level of glucose, creatinine, urea, bilirubin, liver enzymes, blood lipids is determined; coagulogram, which analyzes the indicators of blood clotting; blood hormone tests; determination of tumor markers; tests of blood and other biological materials for infectious diseases; allergological, toxicological, cytological and parasitological examinations.