title: A note on "Design and analysis of stepped wedge cluster randomized trials".
authors.affiliation: Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, United States; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, United States.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Liao
authors.affiliation: Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, United States; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, United States.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, United States; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, United States.
authors.forename: Donna
authors.initials: D
authors.lastname: Spiegelman
mesh_terms: D016358:Contact Tracing; D005260:Female; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods* / Q000706:statistics & numerical data*; D012107:Research Design; D015231:Sexually Transmitted Diseases, Bacterial / Q000517:prevention & control*
keywords: Step wedge design; Time effect; Variance