[1] Univ Autonoma Barcelona, Inst Invest Ciences Salut Germans Trias & Pujol, Dept Genet & Microbiol, Dept Microbiol,Hosp Univ Germans Trias & Pujol, Badalona 08916, Spain
[2] Inst Salud Carlos III, CIBER Enfermedades Respiratorias, Madrid, Spain
[3] Hosp Badalona Germans Trias & Pujol, Emergency Dept, Badalona, Spain
[4] Hosp Badalona Germans Trias & Pujol, Dept Paediat, Badalona, Spain