1. Department of Ophthalmology, University of Debrecen Medical and Health Science Center, Debrecen, Hungary.
2. Department of Internal Medicine, University of Debrecen Medical and Health Science Center, Debrecen, Hungary.
3. Center for Nuclear Medicine, University of Debrecen Medical and Health Science Center, Debrecen, Hungary.
4. Endocrine Section, Department of Medicine, Washington Hospital Center, Washington, District of Columbia.