Power and Sample Size for Restricted Mean Survival Time Based Clinical Trials // Tools for Restricted Mean Survival Time based study design and analysis planning. Provides power and sample size calculations for two-arm studies using direct modeling approaches from the literature, including semiparametric additive models, linear Inverse Probability Weighting based models from Wei (2014) doi:10.1093/biostatistics/kxt050, multiplicative stratified models from Wang (2019) doi:10.1002/sim.8356, and covariate- dependent censoring methods from Wang (2018) doi:10.1007/s10985-017-9391-6.