title: Authors' reply.
authors.affiliation: James White, Centre for Trials Research & Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement (DECIPHer) Cardiff University, Cardiff CF14 4YS, UK, email: whitej11@cf.ac.uk; Paola Zaninotto, Department of Epidemiology and Public Health, University College London, London, UK; Mika Kivimäki, Department of Epidemiology and Public Health, University College London, London, and Institute of Behavioural Sciences, University of Helsinki, Helsinki, Finland; G. David Batty, Department of Epidemiology and Public Health, University College London, London, and Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK.
authors.forename: James
authors.initials: J
authors.lastname: White
authors.affiliation: James White, Centre for Trials Research & Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement (DECIPHer) Cardiff University, Cardiff CF14 4YS, UK, email: whitej11@cf.ac.uk; Paola Zaninotto, Department of Epidemiology and Public Health, University College London, London, UK; Mika Kivimäki, Department of Epidemiology and Public Health, University College London, London, and Institute of Behavioural Sciences, University of Helsinki, Helsinki, Finland; G. David Batty, Department of Epidemiology and Public Health, University College London, London, and Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK.
authors.forename: Paola
authors.initials: P
authors.lastname: Zaninotto
authors.affiliation: James White, Centre for Trials Research & Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement (DECIPHer) Cardiff University, Cardiff CF14 4YS, UK, email: whitej11@cf.ac.uk; Paola Zaninotto, Department of Epidemiology and Public Health, University College London, London, UK; Mika Kivimäki, Department of Epidemiology and Public Health, University College London, London, and Institute of Behavioural Sciences, University of Helsinki, Helsinki, Finland; G. David Batty, Department of Epidemiology and Public Health, University College London, London, and Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK.
authors.forename: Mika
authors.initials: M
authors.lastname: Kivimäki
authors.affiliation: James White, Centre for Trials Research & Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement (DECIPHer) Cardiff University, Cardiff CF14 4YS, UK, email: whitej11@cf.ac.uk; Paola Zaninotto, Department of Epidemiology and Public Health, University College London, London, UK; Mika Kivimäki, Department of Epidemiology and Public Health, University College London, London, and Institute of Behavioural Sciences, University of Helsinki, Helsinki, Finland; G. David Batty, Department of Epidemiology and Public Health, University College London, London, and Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK.
authors.forename: G David
authors.initials: GD
authors.lastname: Batty