Endemic goitre has been reported in the climatic Wet Zone of south-west Sri Lanka for the past 50 years, but rarely occurs in the northern Dry Zone. Despite government sponsored iodised salt programmes, endemic goitre is still prevalent. In recent years, it has been suggested that Se deficiency may be an important factor in the onset of goitre and other iodine deficiency disorders (IDD). Prior to the present study,
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