[1] Hosp Clin Barcelona, Emergency Dept, Villarroel 170, Barcelona 08036, Spain
[2] IDIBAPS, Res Grp Emergency Dept Proc & Pathol, Barcelona, Spain
[3] Hosp Santa Creu & Sant Pau, Emergency Dept, Barcelona, Spain
[4] Hosp Univ Bellvitge, Emergency Dept, Barcelona, Spain
[5] Hosp Univ Cent Asturias, Emergency Dept, Oviedo, Spain
[6] Hosp Clin San Carlos, Emergency Dept, Madrid, Spain
[7] Hosp Clin San Carlos, Res Inst Sanitaria, Madrid, Spain
[8] Hosp Gen Alicante, Emergency Dept, Alicante, Spain