1. Internal Medicine Department, Hospital Universitario de La Princesa, Madrid, Spain
2. Internal Medicine Department, Complex Hospitalari Universitari Moisès Broggi, Universitat de Barcelona, Barcelona, Spain
3. Internal Medicine Department, Hospital Vega Baja, Orihuela, Spain
4. Internal Medicine Department, Hospital Regional Universitario de Málaga, Málaga, Spain
5. Internal Medicine Department, Hospital Universitario Río Hortega. Departamento de Medicina, Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
6. Servicio de Urgencias, Hospital Álvaro Cunqueiro, Vigo, Spain