Benchmarks for designing two-stage studies using modified mini-mental state examinations: experience from the Women's Health Initiative Memory Study.
Espeland MA, Rapp SR, Robertson J, Granek I, Murphy C, Albert M, Bassford T. Benchmarks for designing two-stage studies using modified mini-mental state examinations: experience from the Women's Health Initiative Memory Study. Clin Trials. 2006; 3(2):99-106.