References
- Last JM (Ed.). A Dictionary of Epidemiology. Oxford: Oxford University Press, 1995.
- Fleiss JL. Statistical Methods for Rates and Proportions, 2nd edn. London: John Wiley & Sons, 1981.
- Bland M. An Introduction to Medical Statistics. Oxford: Oxford University Press, 1995.
- EpiInfo 6. Database and Statistics Software for Public Health Professionals. Geneva: CDC & WHO 1997.
- Elashoff JD. NQuery Advisor Version 4.0 Users’s Guide. Los Angeles, 2000.