Utiger, R D Subclinical hyperthyroidism--just a low serum thyrotropin concentration, or something more? [electronic resource] - The New England journal of medicine Nov 1994 - 1302-3 p. digital Publication Type: Comment; Editorial ISSN: 0028-4793 Standard No.: 10.1056/NEJM199411103311909 doi Subjects--Topical Terms: AgedAtrial Fibrillation--etiologyFemaleHumansHyperthyroidism--bloodMaleMiddle AgedRiskThyrotropin--blood