title: Vitamin D testing: three important issues.
authors.affiliation: GP and Clinical Lead for Vitamin D, Liverpool, UK. E-mail: katyagardner@btinternet.com.
authors.forename: Katy
authors.initials: K
authors.lastname: Gardner
authors.forename: Stephen
authors.initials: S
authors.lastname: Zhao
mesh_terms: D002648:Child; D002675:Child, Preschool; D054869:Clinical Audit; D019587:Dietary Supplements; D019317:Evidence-Based Medicine; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D018673:Nutrition Policy; D011181:Postnatal Care; D010818:Practice Patterns, Physicians' / Q000639:trends*; D011247:Pregnancy; D012017:Referral and Consultation / Q000639:trends*; D006113:United Kingdom; D014807:Vitamin D / Q000627:therapeutic use*; D014808:Vitamin D Deficiency / Q000188:drug therapy* / Q000453:epidemiology; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D014807:Vitamin D