Accounting for treatment by center interaction in sample size determinations and the use of surrogate outcomes in the pessary for the prevention of preterm birth trial: a simulation study
Crossref DOI link: https://doi.org/10.1186/s13063-016-1433-y
Published Online: 2016-07-05
Published Print: 2016-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Willan, Andrew R.