title: The efficiency of stepped wedge vs. cluster randomized trials: stepped wedge studies do not always require a smaller sample size.
authors.affiliation: Department of Public Health, University of Birmingham Edgbaston Campus, B15 2TT , Birmingham, UK. Electronic address: k.hemming@bham.ac.uk.
authors.forename: Karla
authors.initials: K
authors.lastname: Hemming
authors.forename: Alan
authors.initials: A
authors.lastname: Girling
mesh_terms: D003863:Depression / Q000175:diagnosis* / Q000628:therapy*; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D018401:Sample Size