a survey of schoolchildren from a severe endemic goitre area in spain.all the boys and girls between six and fourteen years old regularly attending school in three villages from an area in spain known ass las hurdes were studied with respect to thyroid size, body weight and height. casual urine samples were obtained for the determination of iodine and creatine concentrations. capillary blood was spotted on filter paper and used for the determination of thyroxine and thyrotropin by radioimmunoassay. the same survey was carried out in 354 school children from madrid ...19817302120
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