1. Department of Genetics, Faculty of Biology, University of La Laguna, La Laguna, Tenerife, Spain.
2. Nephrology Section, Hospital Universitario de Canarias, University of La Laguna, La Laguna, Tenerife, Spain.
3. Research Unit, Hospital Universitario de Canarias, La Laguna, Tenerife, Spain.
4. Endocrinology Section, Hospital Universitario de Canarias, La Laguna, Tenerife, Spain.