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Serum 25-hydroxyvitamin D status of a large Chinese population from 30 provinces by LC–MS/MS measurement for consecutive 3 years: differences by age, sex, season and province

NutritionLc–ms/ms MeasurementConsecutive 3Large Chinese PopulationNutritional ScienceHuman NutritionPublic HealthMicronutrientsEpidemiologyWomen's Health