1. Department of Microbiology; Universidad Autónoma de San Luis Potosí; San Luis Potosí México
2. Infectious Diseases Unit; Pediatrics Department; Hospital Sant Joan de Déu; Universitat de Barcelona; Barcelona Spain
3. IMIM (Hospital del Mar Medical Research Institute); Barcelona Spain
4. Department of Molecular Microbiology; Hospital Sant Joan de Déu; Universitat de Barcelona; Barcelona Spain
5. Department of Neonatology; Hospital Sant Joan de Déu; Universitat de Barcelona; Barcelona Spain
6. Immunogenetics-HLA; Hospital Universitario Puerta de Hierro; Majadahonda Madrid Spain
7. Immunology Unit; Universitat Pompeu Fabra; Barcelona Spain