About the Authors

Sergio Garbarino

Contributed equally to this work with: Sergio Garbarino, Paolo Durando

Affiliations Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences (DINOGMI), University of Genoa, Genoa, Italy, Department of Health Sciences, Postgraduate School in Occupational Medicine, University of Genoa and Occupational Medicine Unit, IRCCS AOU San Martino IST, Genoa, Italy

Paolo Durando

Contributed equally to this work with: Sergio Garbarino, Paolo Durando

Affiliation Department of Health Sciences, Postgraduate School in Occupational Medicine, University of Genoa and Occupational Medicine Unit, IRCCS AOU San Martino IST, Genoa, Italy

Ottavia Guglielmi

Affiliation Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences (DINOGMI), University of Genoa, Genoa, Italy

Guglielmo Dini

Affiliation Department of Health Sciences, Postgraduate School in Occupational Medicine, University of Genoa and Occupational Medicine Unit, IRCCS AOU San Martino IST, Genoa, Italy

Francesca Bersi

Affiliation Department of Health Sciences, Postgraduate School in Occupational Medicine, University of Genoa and Occupational Medicine Unit, IRCCS AOU San Martino IST, Genoa, Italy

Stefania Fornarino

Affiliation Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences (DINOGMI), University of Genoa, Genoa, Italy

Alessandra Toletone

Affiliation Department of Health Sciences, Postgraduate School in Occupational Medicine, University of Genoa and Occupational Medicine Unit, IRCCS AOU San Martino IST, Genoa, Italy

Carlo Chiorri

Affiliation Department of Educational Sciences, University of Genoa, Genoa, Italy

Nicola Magnavita

nicolamagnavita@gmail.com

Affiliation Institute of Public Health, Università Cattolica del Sacro Cuore, Rome, Italy

Competing Interests

Medical examinations were funded by CNH-Iveco. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. This does not alter our adherence to PLOS ONE policies on sharing data and materials. Print expenses will be covered with University Funds D.1 (year 2015) of the corresponding author (NM).

Author Contributions

Conceptualization: SG. Data curation: OG. Formal analysis: OG CC NM. Funding acquisition: SG. Investigation: SG GD FB SF AT PD. Methodology: SG NM PD. Project administration: SG. Resources: SG. Supervision: SG PD NM CC. Validation: NM. Visualization: CC. Writing – original draft: NM OG. Writing – review & editing: SG PD CC NM.