title: Are clinical laboratories prepared for accurate testing of 25-hydroxy vitamin D?
authors.forename: Ravinder J
authors.initials: RJ
authors.lastname: Singh
mesh_terms: D019963:Clinical Chemistry Tests / Q000592:standards*; D006801:Humans; D012015:Reference Standards; D012016:Reference Values; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000175:diagnosis*
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D