Don’t perform HLA genotyping in the presence of established diagnosis of celiac disease or for screening purpose.

Don’t perform screening tests of polymorphisms of factor V (Leiden) and Factor II (G20210A) in unselected patients, like all patients with only one episodes of venous thrombosis, in healthy subjects or in pregnant women with no specific anamnestic signs or before to start a treatment with oral contraceptives.

According to national and international recommendations and guidelines, testing should not be performed outside of specific medical conditions, e.g.: episodes of venous thrombosis at an early age or the presence of strong familial history, with two or more affected...