1. Institute of Applied Health Research, University of Birmingham, Birmingham, UK
2. Health Services Management Centre, University of Birmingham, Birmingham, UK
3. The Fatherhood Institute, London, UK
4. School of Health Sciences, Faculty of Health and Medicine, and Priority Research Centre for Physical Activity and Nutrition, University of Newcastle, Newcastle, NSW, Australia
5. School of Sport, Exercise and Health Sciences, University of Loughborough, Loughborough, UK
6. Leamington Spa, UK
7. Birmingham Clinical Trials Unit, Institute of Applied Health Research, University of Birmingham, Birmingham, UK
8. Birmingham Community Health Care NHS Foundation Trust, Birmingham, UK
9. School of Education, and Priority Research Centre for Physical Activity and Nutrition, University of Newcastle, Newcastle, NSW, Australia