About the Authors

Arturo Corbatón Anchuelo

Roles Conceptualization, Methodology, Validation, Writing – original draft, Writing – review & editing

arturocorbaton@yahoo.es

Affiliations Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain

María Teresa Martínez-Larrad

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Writing – original draft

Affiliations Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain

Irene Serrano-García

Roles Data curation, Formal analysis, Methodology, Software

Affiliations Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain, UGC de Medicina Preventiva, Hospital Clínico San Carlos, Madrid, Spain

Cristina Fernández Pérez

Roles Conceptualization, Data curation, Formal analysis, Methodology, Supervision

Affiliations Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain, UGC de Medicina Preventiva, Hospital Clínico San Carlos, Madrid, Spain, Facultad de Enfermería, Universidad Complutense de Madrid (UCM), Madrid, Spain

Manuel Serrano-Ríos

Roles Funding acquisition, Supervision, Writing – review & editing

Affiliations Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain

Competing Interests

The authors have read the journal's policy and the authors of this manuscript have the following competing interests: MSR received grants funding from Eli Lilly Lab (2010-115-B99) & Bayer Pharmaceutical Co. (2005-115-B99), respectively. CFP also received partial support for this study from Fundación Mutua Madrileña (FMM-2008), Spain. There are no patents, products in development or marketed products associated with this research to declare. This does not alter our adherence to PLOS ONE policies on sharing data and materials.