1. Epidemiology Unit, Health Research Institute-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid, Madrid, Spain
2. Department of Epidemiology and Biostatistics, Amsterdam University Medical Centers, location VUmc, and Department of Philosophy, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
3. Department of Clinical, Neuro and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
4. The Copenhagen Trial Unit, Centre for Clinical Intervention Research, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
5. Centre for Social Ethics and Policy, School of Law, Williamson Building, University of Manchester, Manchester, UK