An engineered floor with a very thin wear layer, for example a 1mm thickness, cannot be sanded and refinished at all over the lifetime of the floor which can lessen the floors lifespan quite a bit compared to styles that have thicker wear layers.
The smooth muscle (SMA) or actin antibody test is primarily ordered along with antinuclear antibodies (ANA) and liver kidney microsomal type 1 (LKM-1) antibodies to help diagnose autoimmune hepatitis and to differentiate between the two major types of autoimmune hepatitis, type 1 and type 2.
PSA or prostate specific antigen is a blood test that measures a 'chemical' released by the prostate. It is found in low levels in normal men and is not elevated with other forms of cancer. The AUA recently published guidelines on using PSA (Oncology 2000;14:267.)