1. Department of Public Health; Interuniversity Centre for Health Economics Research (I-CHER); Vrije Universiteit Brussel; Brussels Belgium
2. Department of Public Health; Faculty of Medicine and Pharmacy; Vrije Universiteit Brussel; Brussels Belgium
3. Department of Nursing and Midwifery, Nursing and Midwifery research group; Universitair Ziekenhuis Brussel; Brussels Belgium
4. Department of Public Health, Biostatistics and Medical Informatics Research group; Faculty of Medicine and Pharmacy; Vrije Universiteit Brussel; Brussels Belgium
5. School of Nursing and Midwifery; Trinity College Dublin; Dublin Ireland
6. University of Ulster; Institute of Nursing and Health Research; Jordanstown Newtownabbey Northern Ireland UK
7. School of Nursing and Midwifery; National University of Ireland; Galway Ireland
8. Midwifery Research and Education Unit; Hannover Medical School; Hannover Germany
9. Universita degli Studi di Genova; Genova Italy
10. IRCCS Azienda Ospedaliera Universitaria S. Martino IST; Largo R. Benzi Genova Italy