1. WHO. The world health report 2000: health systems: improving performance. Geneva: World Health Organization; 2000.
2. WHO. The World Health Report 2002. Geneva: World Health Organization; 2002.
3. Xu K, Evans DB, Kawabata K, Zeramdini R, Klavus J, Murray CJ. Household catastrophic health expenditure: a multicountry analysis. Lancet. 2003;362:111–7.
4. Kawabata K, Xu K, Carrin G. Preventing impoverishment through protection against catastrophic health expenditure. Bull World Health Organ. 2002;80:612.
5. Wyszewianski L. Financially catastrophic and high-cost cases: definitions, distinctions, and their implication for policy formulation. Inquiry. 1986;23:382–94.