1. School of Nutrition and Dietetics, Faculty of Medicine, University of Zulia, Maracaibo, Venezuela
2. Nephrology Service, Hospital Universitario de Maracaibo, University of Zulia, Maracaibo, Venezuela
3. Nephrology Department, Hospital Clinico Universitario (INCLIVA), Valencia, Spain
4. Endocrine and Metabolic Research Center “Dr. Felix Gomez”, University of Zulia, Maracaibo, Venezuela
5. Nephrology Section, Hospital Universitario Príncipe de Asturias, Alcala de Henares, Madrid, Spain