PerrildHHansenMolholm JSkovstedLChristensenKorsgaard L.Different effects of propranolol, atenolol, sotalol, alprenolol and metoprolol on serum T3 and serum rT3 in hyperthyroidism. Clin Endocrinol1983; 18: 139–42.
2.
HarropJSAshwellKHoptonMR. Circannual and within-individual variation of thyroid function tests in normal subjects. Ann Clin Biochem1985; 22: 371–5.
3.
BrowningMCKFordRPCallaghanSJFraserCG. Intra- and interindividual biological variation of five analytes used in assessing thyroid function; implications for necessary standards of performance and the interpretation of results. Clin Chem1986; 32: 962–6.
4.
ArmitagePBerryG.Statistical Methods in Medical Research, 2nd edn.Oxford: Blackwell Scientific, 1987.