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1988年和1991年,即在全面采用碘盐供应后2～5年,我们在504名和336名11～16岁的在校儿童中调查了甲状腺肿的发病率和尿碘排泄水平。1988年按 WHO 推荐的方法经
In 1988 and 1991, two to five years after the full supply of iodized salt, we investigated the incidence of goiter and urinary iodine excretion in 504 and 336 school children aged 11 to 16 years. According to the WHO recommended method in 1988