About the Authors

Sara Guiducci

Contributed equally to this work with: Sara Guiducci, Silvia Ricci

Roles Conceptualization, Data curation, Investigation, Methodology, Validation, Writing – original draft

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Pediatric Clinic 2, Pediatric Immunology, Meyer Children’s Hospital, Florence, Italy

Maria Moriondo

Roles Conceptualization, Investigation, Methodology, Supervision, Validation

Affiliation Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy

Francesco Nieddu

Roles Conceptualization, Data curation, Investigation, Methodology, Validation, Writing – original draft

chiara.azzari@unifi.it

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Pediatric Clinic 2, Pediatric Immunology, Meyer Children’s Hospital, Florence, Italy

Silvia Ricci

Contributed equally to this work with: Sara Guiducci, Silvia Ricci

Roles Conceptualization, Data curation, Investigation, Methodology, Validation, Writing – original draft

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Pediatric Clinic 2, Pediatric Immunology, Meyer Children’s Hospital, Florence, Italy

Elisa De Vitis

Roles Formal analysis, Investigation, Methodology

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Pediatric Clinic 2, Pediatric Immunology, Meyer Children’s Hospital, Florence, Italy

Arianna Casini

Roles Data curation, Formal analysis, Investigation

Affiliation Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy

Giovanni Maria Poggi

Roles Conceptualization, Methodology, Supervision, Validation

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Department of Interdisciplinary Pediatrics, Section of Medical Pediatrics, Meyer Children's Hospital, Florence, Italy

Giuseppe Indolfi

Roles Conceptualization, Investigation, Methodology, Supervision, Validation

Affiliation Department of Interdisciplinary Pediatrics, Section of Medical Pediatrics, Meyer Children's Hospital, Florence, Italy

Massimo Resti

Roles Conceptualization, Methodology, Supervision, Validation

Affiliation Department of Interdisciplinary Pediatrics, Section of Medical Pediatrics, Meyer Children's Hospital, Florence, Italy

Chiara Azzari

Roles Conceptualization, Data curation, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Visualization, Writing – review & editing

Affiliations Department of Health Sciences, Section of Pediatrics, University of Florence, Florence, Italy, Pediatric Clinic 2, Pediatric Immunology, Meyer Children’s Hospital, Florence, Italy

Competing Interests

SG received a scholarship from GSK for meningococcal epidemiology; GSK did not participate in study design, data analysis, manuscript writing and in any other aspects related to the present work. This does not alter our adherence to PLOS ONE policies on sharing data and materials. The authors have no other conflict of interest.