3WHO/UNICEF/ICCIDD. Assessment of iodine deficiency disorders and monitoring their elimination. A guide for programe managers [R]. 3rd ed. Geneva: WH0,2007:32-34.
4Zimmermann MB, Ito Y, Hess SY, et al. High thyroid volume in children with excess dietary iodine intakes [J]. Am J Clin Nutr, 2005,81 (4) : 840-84.