About the Authors

Aquiles Salas

Affiliation Medicine Department, Caracas University Hospital, Faculty of Medicine, Universidad Central de Venezuela, Caracas, Venezuela

Daisy Acosta

Affiliation Universidad Nacional Pedro Henriquez Ureña (UNPHU), Internal Medicine Department, Geriatric Section, Santo Domingo, Dominican Republic

Cleusa P. Ferri

Affiliation Universidade Fedral de São Paulo, Department of Psychobiology, Sao Paulo, Brasil

Mariella Guerra

Affiliation Psychogeriatric Unit, National Institute of Mental Health “Honorio Delgado Hideyo Noguchi”, Lima, Peru

Yueqin Huang

Affiliation Peking University, Institute of Mental Health, Beijing, China

K. S. Jacob

Affiliation Christian Medical College, Vellore, India

Ivonne Z. Jimenez-Velazquez

Affiliation Internal Medicine Dept., Geriatrics Program, School of Medicine, Medical Sciences Campus, University of Puerto Rico, San Juan, Puerto Rico

Juan J. Llibre Rodriguez

Affiliation Facultad de Medicina Finlay-Albarran, Medical University of Havana, Havana, Cuba

Ana L. Sosa

Affiliation National Institute of Neurology and Neurosurgery of Mexico, National Autonomous University of Mexico, Mexico City, Mexico

Richard Uwakwe

Affiliation Nnamdi Azikiwe University Teaching Hospital, Nnewi, Anambra State, Nigeria

Joseph D. Williams

Affiliation Department of Community Health, Voluntary Health Services, Chennai, India

A. T. Jotheeswaran

Affiliation Public Health Foundation of India, New Delhi, India

Zhaorui Liu

Affiliation Peking University, Institute of Mental Health, Beijing, China

A. M. Lopez Medina

Affiliation Policlinico 19 de abril, Plaza, La Habana, Cuba

Rosa Maria Salinas-Contreras

Affiliation National Institute of Neurology and Neurosurgery of Mexico, National Autonomous University of Mexico, Mexico City, Mexico

Martin J. Prince

martin.prince@kcl.ac.uk

Affiliation King’s College London, Institute of Psychiatry, Health Service and Population Research Department, London, United Kingdom

Competing Interests

None of the authors identified any competing interests. The University of Puerto Rico received an unrestricted educational grant from Pfizer Co USA to fund the clinical chemistry analyses, including glucose, in that site. Pfizer Co and other sponsors of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report. Neither does their funding affect in any way affect the authors' adherence to PLOS ONE policies on sharing data and materials. All authors had full access to all the data in the study, and the corresponding author had final responsibility for the decision to submit for publication.

Author Contributions

Conceived and designed the experiments: AS DA CPF MG YH KSJ IZJ-V JJLR ALS RU JDW ZL AMLM MJP. Performed the experiments: AS DA CPF MG YH KSJ IZJ-V JJLR ALS RU JDW ZL AMLM MJP RMSC. Analyzed the data: MJP. Contributed reagents/materials/analysis tools: MJP. Wrote the paper: AS MJP. Leads the 10/66 Dementia Research Group: MJP. Study co-ordinator: CPF. Principal investigators responsible for field work in their countries: JJLR DA IZJ-V MG AS ALS KSJ JDW YH. Project coordination in their respective sites: ATJ ZL AMLM.