1. Department of Nephrology, Hospital Central Defense Gomez Ulla, Madrid, Spain
2. Department of Nephrology, Hospital Fuenlabrada, Madrid, Spain
3. Department of Anatomic Pathology, Hospital Gregorio Marañon, Madrid, Spain
4. Department of Hematology, Hospital Central Defense Gomez Ulla, Madrid, Spain
5. Department of Cardiology, Hospital Central Defense Gomez Ulla, Madrid, Spain
6. Department of Nephrology, Hospital Cayetano Heredia, Lima, Peru