1 Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, United States of America.
2 Department of Endocrinology, Diabetes and Metabolic Diseases, University Medical Center Ljubljana, Zaloska 7, 1000 Ljubljana, Slovenia; Medical Faculty Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia.
3 Department of Internal Medicine, Division of Endocrinology, American University of Beirut Medical Center, Beirut, Lebanon.
4 Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, United States of America; Department of Medicine, Boston VA Healthcare System, Boston, MA 02130, United States of America. Electronic address: cmantzor@bidmc.harvard.edu.