Calculates sample size, effect size and power based on Fisher's exact test
response rate of standard treatment
response rate of experimental treatment
size of the test (default 5%)
power of the test (default 80%)
treatments are randomized in 1:r ratio (default r=1)
the sample size program searches for sample sizes in a range (+/- npm) to get the exact power
the maximum group size for which exact power is calculated
Casagrande, JT., Pike, MC. and Smith PG. (1978). An improved approximate formula for calculating sample sizes for comparing two binomial distributions. Biometrics 34, 483-486.
Fleiss, J. (1981) Statistical Methods for Rates and Proportions.
Schlesselman, J. (1987) Re: Smallest Detectable Relative Risk With Multiple Controls Per Case. Am. J. Epi.