title: A specific assay of vitamin D-3 in human serum.
mesh_terms: D002762:Cholecalciferol / Q000097:blood* / Q000528:radiation effects; D004872:Ergocalciferols / Q000097:blood; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D004872:Ergocalciferols; D002762:Cholecalciferol