title: Towards a trial-based definition of vitamin D deficiency.
authors.affiliation: Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand; Department of Endocrinology, Auckland District Health Board, Auckland, New Zealand. Electronic address: i.reid@auckland.ac.nz.
authors.forename: Ian R
authors.initials: IR
authors.lastname: Reid