title: Response to letter to editor.
authors.affiliation: Department of Medicine, University of Auckland, Auckland, New Zealand, i.reid@auckland.ac.nz.
authors.forename: I R
authors.initials: IR
authors.lastname: Reid
authors.forename: M J
authors.initials: MJ
authors.lastname: Bolland
mesh_terms: D015519:Bone Density / Q000187:drug effects*; D050071:Bone Density Conservation Agents / Q000494:pharmacology*; D019587:Dietary Supplements; D006801:Humans; D014807:Vitamin D / Q000494:pharmacology*
chemical_list: D050071:Bone Density Conservation Agents; D014807:Vitamin D