1. Emergency Department, Hospital Universitari de Bellvitge, Institute of Biomedical Research of Bellvitge (IDIBELL), University of Barcelona (UB) , Feixa Llarga s/n, L’Hospitalet de Llobregat 08907, Barcelona , Spain
2. Emergency Department, Consorci Hospitalari de Terrassa , 08227 Terrassa, Barcelona , Spain
3. Cardiology Department, Health Research Institute of the Balearic Islands (IdISBa), Hospital Universitari Son Espases , 07010 Palma , Spain
4. Emergency Department, Short Stay Unit and Hospital at Home, Hospital General de Alicante, Instituto de Investigación Sanitaria y Biómedica de Alicante (ISABIAL), Miguel Hernández University , 03010 Alicante , Spain
5. Emergency Department, Hospital Central Asturias , 33011 Oviedo , Spain
6. Emergency Department, Hospital Clínico San Carlos, Universidad Complutense , 28040 Madrid , Spain
7. Emergency Department, Hospital Clínic, IDIBAPS, University of Barcelona , 08036 Barcelona , Spain
8. Emergency Department, Hospital Doctor Peset , 46017 Valencia , Spain
9. Emergency Department, Hospital Universitario La Fe , 46009 Valencia , Spain
10. Emergency Department, Hospital del Mar , 08003 Barcelona , Spain
11. Emergency Department, Hospital Virgen de la Macarena , 41009 Sevilla , Spain
12. Emergency Department, Hospital Reina Sofía de Córdoba, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC) , 14004 Córdoba , Spain
13. Emergency Department, Hospital Marqués de Valdecilla , 39008 Santander , Spain
14. Emergency Department, Hospital Reina Sofía , 30003 Murcia , Spain
15. Emergency Department, Hospital Infanta Leonor , 28031 Madrid , Spain
16. Emergency Department, Hospital Rey Juan Carlos, Móstoles , 28933 Madrid , Spain
17. Emergency Department, Hospital Universitario de Salamanca , 37007 Salamanca , Spain