[1] Univ Europea Madrid, Hosp Univ Infanta Sofia, Dept Paediat, Paediat Res Grp, Madrid, Spain
[2] Inst Invest 12 Octubre imas12, Fdn Invest Biomed Hosp 12 Octubre, Madrid, Spain
[3] Hosp Univ Infanta Sofia, Microbiol Lab, UR Salud, Madrid, Spain
[4] Univ Europea Madrid, Hosp Univ Infanta Leonor, Dept Paediat, Madrid, Spain
[5] Gregorio Maranon Hosp, Inst Invest Gregorio Maranon IiSGM, Pediat Infect Dis Unit, Madrid, Spain
[6] CIBER Enfermedades Infecciosas CIBERINFEC, Madrid, Spain
[7] Hosp Univ 12 Octubre, Dept Paediat, Paediat Infect Dis Unit, Madrid, Spain