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Evaluation of Vitamin D Standardization Program protocols for standardizing serum 25-hydroxyvitamin D data: a case study of the program’s potential for national nutrition and health surveys

NutritionHealth PolicyClinical NutritionPublic Health NutritionCase StudyNutritional SciencesHealth SurveysHuman NutritionNational NutritionPublic HealthMicronutrientsNutritional ScienceNutrition Assessment