Seasonal changes in serum TSH concentrations observed from a big dataset obtained during 6 consecutive years from 2010 to 2015 at a single hospital in Japan.

Yoshihara A, Noh J, Watanabe N, Iwaku K, Kunii Y, Ohye H, Suzuki M, Matsumoto M, Suzuki N, Sugino K, Thienpont L, Hishinuma A, Ito K. Thyroid 2018;28:429-436.