Ministry of Health Mexico - National Institute of Medical Sciences and Nutrition Salvador Zubiran, Radboud University Nijmegen - Section of Paediatric Infectious Diseases, Ministry of Health Mexico - National Institute of Medical Sciences and Nutrition Salvador Zubiran, Stanford University - Department of Anesthesiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán - Department of Neurology and Psychiatry, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán - Department of Neurology and Psychiatry, Stanford University - Department of Anesthesiology, University of California, San Francisco (UCSF) - Department of Epidemiology and Biostatistics, Stanford University - Department of Microbiology and Immunology, Stanford University - Department of Anesthesiology, University of Freiburg - Institute of Neuropathology, Stanford University - Department of Microbiology and Immunology, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford University School of Medicine - Department of Pathology, Tecnológico de Monterrey - School of Medicine and Health Sciences, Stanford University - Department of Microbiology and Immunology, Stanford University - Department of Pediatrics and Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán - Department of Neurology and Psychiatry