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The annual trend of change in undesirable vitamin D status and cardiometabolic risk factors (
, poor vitamin D status; 
, high BMI; 
, high TAG; 
, high total cholesterol; 
, high LDL cholesterol; 
, low HDL cholesterol) among 530 apparently healthy children aged 5–18 years from six Iranian provinces with a latitudinal gradient from 29°N to 37·5°N (summer, August–September; winter, February–March)
