1. Department of Health Technology Assessment and Health Economics, Institute for Clinical Effectiveness and Health Policy (IECS), Buenos Aires, Argentina
2. Centre for Health Economics, University of York, York, UK
3. Department of Economics, Universidad de Buenos Aires, Buenos Aires, Argentina
4. Unidad de Evaluación de Tecnologías Sanitarias, Centro de Investigación Clínica, Pontificia Universidad Católica de Chile, Santiago, Chile