Sample size calculations for stepped wedge trials using design effects are only approximate in some circumstances
Crossref DOI link: https://0-doi-org.brum.beds.ac.uk/10.1186/s13063-016-1359-4
Published Online: 2016-05-04
Published Print: 2016-12
Update policy: https://0-doi-org.brum.beds.ac.uk/10.1007/springer_crossmark_policy
Hemming, Karla