1. Institut National de la Santé et de la Recherche Médicale, U558, Toulouse, France
2. Université Toulouse III Paul Sabatier, Département d’Epidémiologie Economie de la santé et Santé publique, Toulouse, France
3. Centre Hospitalier Universitaire de Toulouse, Service d'Epidémiologie, Toulouse, France
4. Newcastle University, School of Population and Health Sciences, Newcastle-upon-Tyne, United Kingdom
5. Universitatsklinikum Schleswig-Holstein, Klinik fur Kinder, Lubeck, Germany
6. Göteborg University, Queen Silvia Children's Hospital, Göteborg, Sweden
7. Université Joseph Fourier, Laboratoire Techniques de l’Ingénierie Médicale et de la Complexité, Grenoble, France
8. Enable Ireland, Lavanagh Centre, Cork, Ireland
9. National Institute of Public Health, Copenhagen, Denmark
10. School of Nursing & Midwifery, Queen's University Belfast, Belfast, United Kingdom
11. School of Clinical Medical Sciences
12. Azienda Sanitaria Locale Viterbo, Viterbo, Italy
13. Sir James Spence Institute, Newcastle University, Newcastle-upon-Tyne, United Kingdom