1. Faculdade de Medicina, Institute of Preventive Medicine and Public Health & ISAMB – Institute of Environmental Health, Universidade de Lisboa, Lisboa, Portugal
2. Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
3. Faculty of Medicine, Center for Health Technology and Services Research (CINTESIS), University of Porto, Porto, Portugal
4. Department of Health Care Policy, Harvard Medical School, Boston, MA, USA
5. School of Public Health, The University of Sydney, Sydney, Australia
6. Faculty of Medicine, Center for Health Technology and Services Research (CINTESIS) & MEDCIDS, University of Porto, Porto, Portugal