1. 1. World Health Organisation, Active Ageing: A Policy Framework (World Health Organisation, Geneva, Switzerland, 2002).
2. 2. OECD, A Disease-Based Comparison of Health Systems—What is Best and at What Cost? (OECD Publications, France, 2003).
3. 3. Commission of the European Communities, Towards a Europe for All Ages—Promoting Prosperity and Intergenerational Solidarity (Commission of the European Communities, Brussels, 1999).
4. 4. OECD, Health at a Glance (OECD Publications, France, 2001).
5. 5. A. Alijani, G.B. Hanna, D. Ziyaie, S.L. Burns, K.L. Campbell, M.E.T McMurdo and A. Cuschieri, Instrument for objective assessment of appropriateness of surgical bed occupancy: Validation study, BMJ 326 (2003) 1243–1244.