Author: Michael F Holick // Date: MAY.1.2010 // Source: Clinical Chemistry Topics: Analytes, Vitamins and Trace Elements Listen to the Clinical Chemistry Podcast Article Michael F Holick. The D-lemma: To Screen or Not to Screen for 25-Hydroxyvitamin D Concentrations. Clin Chem 2010; 56:5 729–731. Guest Michael F. Holick is Professor of Medicine, Physiology, and Biophysics, and Director of the Bone Healthcare Clinic at Boston University Medical Center. Transcript [Download pdf]