Mayo Clinic Proceedings · 1999 · 137 citations · 9 references
PharmacyNutritional SciencesDietary AssessmentDietary Supplement InformationDietary Supplement RegulationMedication UsePeriodic Health ExaminationSupplement RegulationDietary Supplement Intake AssessmentDietary Supplement MonitoringDietary Supplement PharmacovigilanceMedication IntakeSupplement Use AssessmentSupplement Use Surveillance
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Nutrient intake and supplementation in the United States (NHANES II).
Jeffrey P. Koplan, J L Annest, P M Layde et al. · American Journal of Public Health · 1986 · 178 citations