Siyasinghe, N.M.Sooriyarachchi, M.R.2012-06-272012-06-272011Journal of the National Science Foundation of Sri Lanka39(1)pp.77-89https://dl.nsf.gov.lk/handle/1/9010StatisticsCrossover trialSample sizeExact methodLarge sample methodMathematical modelsSimulationClinical trialsGuidelines for calculating sample size in 2x2 crossover trials. a simulation studyArticle