Lack of association of nonautoimmune hyperfunctioning thyroid disorders and a germline polymorphism of codon 727 of the human thyrotropin receptor in a european caucasian population - Mühlberg, T; Herrmann, K; Joba, W; Kirchberger, M; Heberling, H J; Heufelder, A E (J Clin Endocrinol Metab, 2000)