1. Department of Cardiology, Hospital Universitario de Guadalajara, Guadalajara, Spain
2. Department of Intensive Medicine, Hospital Universitario de Guadalajara, Guadalajara, Spain
3. Department of Cardiology, Hospital Universitario Central de Asturias, Oviedo, Spain; Department of Medicine, Universidad de Oviedo, Oviedo, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain