1. Department of Immunology, National Institute of Endocrinology, Havana, Cuba
2. Department of Diabetes, National Institute of Endocrinology, Havana, Cuba
3. Biochemical Laboratory, National Institute of Endocrinology, Havana, Cuba
4. Endocrinology Service, National Institute of Endocrinology, Havana, Cuba
5. Diabetes Care Center, National Institute of Endocrinology, Havana, Cuba