Our petitioners have been very patient.PE1056, from Gordon McPherson, Jane McPherson and Steven McPherson, calls on the Scottish Parliament to urge the Scottish Executive or Government to introduce mandatory assessment tools for all health boards for the diagnosis of deep vein thrombosis; to ensure commonality of patient guidance information on DVT; and to introduce a newborn screening programme for the factor V Leiden gene, which has been shown to increase susceptibility to DVT.