1 Department of Digestive Diseases and CIBEREHD, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, and Facultad de Medicina, Universidad Complutense, Madrid, Spain.
2 Department of Cardiology and CIBERCV, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, and Facultad de Medicina, Universidad Complutense, Madrid, Spain.
3 Department of Cardiology and CIBERCV, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, and Facultad de Medicina, Universidad Complutense, Madrid, Spain. Electronic address: javier.bermejo@salud.madrid.org.