1 Renal Physiopathology Laboratory, Department of Nephrology, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM)-Hospital General Universitario Gregorio Marañón, Madrid, Spain.
2 Department of Medicine, School of Medicine, Universidad Complutense, Madrid, Spain.
3 Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain.