Cost effective measures to standardize serum 25(OH)D values from completed studies.
Office of Dietary Supplements, National Institutes of Health, 6100 Executive Blvd., Rm. 3B01, Bethesda, MD, 20892-7517, USA. semposch@mail.nih.gov.|FedEx, Rockville, MD, 20852, USA. semposch@mail.nih.gov.
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CT
Sempos
Department of Public Health Sciences, Loyola University Stritch School of Medicine, Maywood, IL, 60153, USA.
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Durazo-Arvizu
DEQAS Organiser, Charing Cross Hospital, London, W6 8RF, UK.
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GD
Carter
D006801:Humans; D014807:Vitamin D / Q000097:blood*; D014808:Vitamin D Deficiency / Q000097:blood*
D014807:Vitamin D