Zhang, Y. et al. 2024. CRTFASTGEEPWR: A SAS Macro for Power of Generalized Estimating Equations Analysis of Multi-Period Cluster Randomized Trials with Application to Stepped Wedge Designs. Journal of Statistical Software, Code Snippets. 108, 1 (Mar. 2024), 1–27. DOI:https://doi.org/10.18637/jss.v108.c01.