дура ты, эта статья для пациентовна смотри нормыhttps://www.google.com/search?q=%D0%BD%D0%BE%D1%80%D0%BC%D1%8B+%D0%BB%D0%B5%D0%B9%D0%BA%D0%BE%D1%86%D0%B8%D1%82%D0%BE%D0%B2+%D0%BA%D1%80%D0%BE%D0%B2%D0%B8&client=safari&rls=en&tbm=isch&source=iu&ictx=1&fir=wcw-bSSdjExWcM%253A%252CdAIf8FfRlM6p7M%252C_&vet=1&usg=AI4_-kT9-OAT3JrdJjNm6gIteOynXAeq5Q&sa=X&ved=2ahUKEwjkxLTettboAhUPr4sKHUygDQoQ9QEwA3oECAkQHg