1. Umeå University; Department of Public Health and Clinical Medicine; Umeå Sweden
2. Indian Institute of Technology - Madras; Centre of Technology and Policy; Chennai India
3. Norwegian Institute of Public Health; P.O. Box 4404, Nydalen Oslo Norway N-0403
4. Johns Hopkins Bloomberg School of Public Health; Department of Health Policy and Management; 615 North Wolfe Street Baltimore Maryland USA 21205
5. Pontificia Universidad Católica de Chile; Department of Internal Medicine and Evidence-Based Healthcare Program, Faculty of Medicine; Lira 44, Decanato Primer piso Santiago Chile