
Keywords: FT4، تیروکسین آزاد; ACTH, adrenocorticotropic hormone; EQAS, external quality assurance schemes; FSH, follicular stimulating hormone; EA, endogenous antibodies; fT4, free thyroxine; HCU, Hospital Clínico Universitario “Lozano Blesa”; MRI, magnetic resonance imaging; LH, lute