0.5 mL serum.
Ship in insulated container with freezer packs.
Do not use SST blood collection tubes. Collect blood into a red-top vacutainer; avoid hemolysis. Separate serum from cells as soon as possible following collection and transfer to a leakproof tube. Refrigerate until shipped.
Note: add on thyroid tests will be billed individually. See Clinical Pathology section -hyperthyroidism *& hypothyroidism * of the User's Guide.