About the Authors

Nicola Veronese

Roles Data curation, Methodology

ilmannato@gmail.com

Affiliation National Research Council, Neuroscience Institute, Aging Branch, Padova, National Institute of Gastroenterology “S. De Bellis” Research Hospital, Castellana Grotte (Ba), Italy

Brendon Stubbs

Roles Writing – original draft

Affiliation South London and Maudsley NHS Foundation Trust, Denmark Hill, London, United Kingdom

Ai Koyanagi

Roles Formal analysis

Affiliation Research and Development Unit, Parc Sanitari Sant Joan de Déu, Fundació Sant Joan de Déu, CIBERSAM, Sant Boi de Llobregat, Barcelona, Spain

Alberto Vaona

Roles Writing – original draft

Affiliation Primary Care Department, Azienda ULSS20 Verona, Verona, Italy

Jacopo Demurtas

Roles Writing – original draft

Affiliation Primary Care Department, Azienda USL Toscana Sud Est, Grosseto, Italy

Patricia Schofield

Roles Writing – review & editing

Affiliation Faculty of Health, Social Care and Education, Anglia Ruskin University, Chelmsford, United Kingdom

Stefania Maggi

Roles Writing – review & editing

Affiliation National Research Council, Neuroscience Institute, Aging Branch, Padova, National Institute of Gastroenterology “S. De Bellis” Research Hospital, Castellana Grotte (Ba), Italy

Competing Interests

We have the following interests: Merck Research Laboratories; Novartis Pharmaceuticals Corporation, GlaxoSmithKline; and Pfizer, Inc supported the OAI study. There are no patents, products in development or marketed products to declare. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials.