Incidence of antibodies blocking thyrotropin effect in vitro in patients with euthyroid or hypothyroid autoimmune thyroiditis - Chiovato, L; Vitti, P; Santini, F; Lopez, G; Mammoli, C; Bassi, P; Giusti, L; Tonacchera, M; Fenzi, G; Pinchera, A (J Clin Endocrinol Metab, 1990)