title: [Borderline hyperthyroidism. When must it be treated?].
mesh_terms: D000367:Age Factors; D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology; D006801:Humans; D006980:Hyperthyroidism / Q000175:diagnosis / Q000209:etiology / Q000628:therapy*; D013960:Thyroid Function Tests