THYROTROPIN RELEASING HORMONE (TRH)
**Also known as TRAb (TSH Receptor Binding AB)
Draw blood in a SST. Allow serum to clot at room temperature 1 hour. Centrifuge, separate serum from cells and send 1.0 mL serum (0.5 mL minimum) refrigerated in a screw-capped plastic vial.
Enzyme Linked Immunosorbent Assay
Room temperature: 7days; Refrigerated: 14 days; Frozen: 21 days