1 Internal Medicine Department, 12 de Octubre University Hospital, Research Institute Hospital 12 de Octubre "i+12 Institute", Madrid, Spain. Electronic address: jaime@lora-tamayo.es.
2 Internal Medicine Department, 12 de Octubre University Hospital, Research Institute Hospital 12 de Octubre "i+12 Institute", Madrid, Spain.
3 Internal Medicine Department, Bellvitge University Hospital-IDIBELL, L'Hospitalet de Llobregat (Barcelona), Spain.
4 Internal Medicine Department, Gregorio Marañon University Hospital, Madrid, Spain.
5 Internal Medicine Department, La Paz University Hospital, Madrid, Spain.
6 Internal Medicine Department, Albacete University Hospital Complex, Albacete, Spain.
7 Internal Medicine Department, Puerta de Hierro University Hospital, Majadahonda (Madrid), Spain.
8 Internal Medicine Department, Miguel Servet Hospital, Zaragoza, Spain.