1. 1Department of Ophthalmology and Visual Sciences, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA
2. 2Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA
3. 3Department of Medicine & Surgery, University of Insubria, Endocrine Unit, ASST dei Sette Laghi, Varese, Italy