[1] Univ Barcelona, Hosp St Joan de Deu, Dept Paediat, Barcelona, Spain
[2] Inst Recerca St Joan de Deu, Paediat Infect Dis Res Grp, Esplugas de Llobregat, Spain
[3] CIBERESP, CIBER Epidemiol & Salud Publ, Madrid, Spain
[4] Hosp St Joan de Deu, Dept Mol Microbiol, Esplugas de Llobregat, Spain
[5] Univ Barcelona, Hosp St Joan de Deu, Dept Paediat Neurol, Barcelona, Spain
[6] Univ Barcelona, Hosp St Joan de Deu, Dept Diagnost Imaging, Barcelona, Spain
[7] Univ Barcelona, Hosp St Joan de Deu, Paediat Intens Care Unit, Barcelona, Spain
[8] Univ Barcelona, Hosp St Joan de Deu, Emergency Dept, Barcelona, Spain
[9] Publ Hlth Agcy Catalonia, Barcelona South, Epidemiol Surveillance Unit Hlth Reg, Lhospitalet De Llobregat, Spain
[10] Inst Publ Hlth Carlos III, Natl Ctr Microbiol, Enterovirus Unit, Madrid, Spain
[11] Univ Int Catalunya, Sch Med, Barcelona, Spain