1. Division of Endocrinology, Stanford University School of Medicine , Stanford, CA 94305 , USA
2. Department of Metabolism & Experimental Therapeutics, Division of Medicine, University College London , London WC1E6DE , UK
3. Department of Endocrinology, IASO General Clinic , Athens 15123 , Greece
4. Department of Ophthalmology, Stanford University School of Medicine , Stanford, CA 94304 , USA