title: The D-lemma: to screen or not to screen for 25-hydroxyvitamin D concentrations.
authors.affiliation: Department of Medicine, Section of Endocrinology, Nutrition, and Diabetes, Vitamin D, Skin, and Bone Research Laboratory, Boston University Medical Center, Boston, MA, USA. mfholick@bu.edu
authors.forename: Michael F
authors.initials: MF
authors.lastname: Holick