REFERENCES
- Apple D J, Ram J, Foster A, et al. Elimination of cataract blindness: a global perspective entering the new millenium. Survey Ophthalmol 2000; 45(Suppl 1)S1–S196
- UNICEF. World Population Prospects: The 2006 Revision Population Database. 2007, 2007(08/28)
- Li S, Xu J, He M, et al. A survey of blindness and cataract surgery in Doumen County, China. Ophthalmol. 1999; 106(8)1602–1608
- Zhang S Y, Zou L H, Gao Y Q, et al. National epidemiological survey of blindness and low vision in China. Chinese Med J. 1992; 105(7)603–608
- Xu L, Wang Y, Li Y, et al. Causes of blindness and visual impairment in urban and rural areas in Beijing: the Beijing Eye Study. Ophthalmology 2006; 113(7)1134.e1–1134.e11
- Cataract: Epidemiology and Service Delivery. Surv Ophthalmol 2000; 45(Suppl 1)S32–S44
- Sicular T, Yue X, Gustafsson B, et al. The Urban-Rural Income Gap and Inequality in China, Research Paper No. 2006/135, WIDER, Helsinki
- He M, Chan V, Baruwa E, et al. Willingness to pay for cataract surgery in rural Southern China. Ophthalmology. 2007; 114(3)411–416
- Zimmer Z, Kwong J. Family size and support of older adults in urban and rural China: current effects and future implications. Demography. 2003; 40(1)23–44
- Smith R D, Olsen J, Harris A. A Review of Methodological Issues in the Conduct of WTP Studies in Health Care II: Administration of A CV Survey. 1999, Working Paper 85
- Onwujekwe O. Searching for a better willingness to pay elicitation method in rural Nigeria: the binary question with follow-up method versus the bidding game technique. Health Econ. 2001; 10(2)147–158
- Statacorp. Statistical Software: Release 10.0. 2007
- Kumaranayake L. The real and the nominal? Making inflationary adjustments to cost and other economic data. Health Policy Plann. 2000; 15(2)230–234
- Shrestha M K, Thakur J, Gurung C K, et al. Willingness to pay for cataract surgery in Kathmandu valley. The Br J Ophthalmol. 2004; 88(3)319–320
- Lewallen S, Courtright P. Gender and use of cataract surgical services in developing countries. Bull World Health Organ. 2002; 80(4)300–303