Endogenous subclinical hyperthyroidism affects quality of life and cardiac morphology and function in young and middle-aged patients - Biondi, B; Palmieri, E A; Fazio, S; Cosco, C; Nocera, M; Sacca, L; Filetti, S; Lombardi, G; Perticone, F (J Clin Endocrinol Metab, 2000)