title: Letter re: 25-OH-vitamin D assays.
authors.forename: Erich E
authors.initials: EE
authors.lastname: Fradinger
mesh_terms: D005260:Female; D006801:Humans; D015663:Osteoporosis, Postmenopausal / Q000188:drug therapy*; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000453:epidemiology*
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D