0021-972X/05/$15.00/0 The Journal of Clinical Endocrinology & Metabolism 90(5):3028–3035 Printed in U.S.A. Copyright © 2005 by The Endocrine Society doi: 10.1210/jc.2004-1394 Silencing of the Tumor Suppressor Gene SLC5A8 Is Associated with BRAF Mutations