Erratum to: Sample size calculations for cluster randomised controlled trials with a fixed number of clusters
Crossref DOI link: https://doi.org/10.1186/s12874-017-0292-x
Published Online: 2017-01-19
Published Print: 2017-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Hemming, Karla
Girling, Alan J
Sitch, Alice J
Marsh, Jennifer
Lilford, Richard J