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Serum concentrations of free thyroxine (6lled circles) in relation to coronary angioplasty. The patient had received radioiodine treatment (asterisk) 12 weeks preceding coronary angioplasty with iodinated contrast (week 0, arrow). Dotted horizontal lines mark the lower and upper limits of laboratory reference range for free thyroxine (12.0–22.0 pmol/L).
