43，Bauer DC，Brown AN．Sensitive thyrotropin and free thyroxine testing in outpatients:are both necessary？Arch Intern Med，1996，156:2333-2339．
54，Pollock MA，Jone A.Laboratory based study of undetectable thyroid stimulating hormone．J Clin Pathol，1989，42:1237-1245．
65，Sundbeck G，Jagenburg R，Johansson PM，et al．Clinical significance of low serum thyrotropin concentration by chemiluminometric assay in 85-year-old women and men．Arch Intern Med，1991，151:549-555．
76，Potesta P，Murolo R，Costantini S，et al．High prevalence of asymptomatic hypothyrodism and hyperthyroidism in hospitalized elderly females．Eur Rew Med Pharmacol Sci，1996，18:129-133．
87，Konno N，Yuri K，Taguchi H，et al．Screening for thyroid diseases in an iodine sufficient area with sensitive thyrotropin assays，and serum thyroid autoantibody and urinary iodide determinations．Clin Endocrinol，1993，38:273-281．
98，Sawin CT，Geller A，Wolf PA，et al．Low serum thyrotropin:a risk factor for atrial fibrillation in older persons．N Eng J Med，1994，331:1249-1256．
