title: Authors' reply.
authors.affiliation: Christopher J. Armitage, Professor of Health Psychology, University of Manchester. Email: chris.armitage@manchester.ac.uk; Wirda Abdul Rahim, Richard Rowe, Department of Psychology, University of Sheffield; Rory C. O'Connor, Institute of Health and Wellbeing, University of Glasgow.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Armitage
authors.affiliation: Christopher J. Armitage, Professor of Health Psychology, University of Manchester. Email: chris.armitage@manchester.ac.uk; Wirda Abdul Rahim, Richard Rowe, Department of Psychology, University of Sheffield; Rory C. O'Connor, Institute of Health and Wellbeing, University of Glasgow.
authors.forename: Wirda Abdul
authors.initials: WA
authors.lastname: Rahim
authors.affiliation: Christopher J. Armitage, Professor of Health Psychology, University of Manchester. Email: chris.armitage@manchester.ac.uk; Wirda Abdul Rahim, Richard Rowe, Department of Psychology, University of Sheffield; Rory C. O'Connor, Institute of Health and Wellbeing, University of Glasgow.
authors.forename: Richard
authors.initials: R
authors.lastname: Rowe
authors.affiliation: Christopher J. Armitage, Professor of Health Psychology, University of Manchester. Email: chris.armitage@manchester.ac.uk; Wirda Abdul Rahim, Richard Rowe, Department of Psychology, University of Sheffield; Rory C. O'Connor, Institute of Health and Wellbeing, University of Glasgow.
authors.forename: Rory C
authors.initials: RC
authors.lastname: O'Connor