The prevalence of thyroid disorders during early pregnancy in China: The benefits of universal screening in the first trimester of pregnancy - Wang, W; Teng, W; Shan, Z; Wang, S; Li, J; Zhu, L; Zhou, J; Mao, J; Yu, X; Chen, Y; Xue, H; Fan, C; Wang, H; Zhang, H; Li, C; Zhou, W; Gao, B; Shang, T; Ding, B; Ma, Y; Wu, Y; Xu, H; Liu, W (Eur J Endocrinol, 2011)