1. MRC Centre for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London W2 1PG, United Kingdom
2. The Alan Turing Institute, John Dodson House, London NW1 2DB, United Kingdom
3. Laboratory of Biostatistics, Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy
4. Department of Epidemiology, Local Health Unit TO 3, Turin 10095, Italy
5. School of Educational Sciences and Psychology, University of Eastern Finland, Joensuu FI-80101, Finland
6. Division of Insurance Medicine, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm 17177, Sweden
7. Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu 90014, Finland
8. Ageing Epidemiology (AGE) Research Unit, School of Public Health, Imperial College of London, London W2 1PG, United Kingdom