Adding a treatment arm to an ongoing clinical trial: a review of methodology and practice
Crossref DOI link: https://doi.org/10.1186/s13063-015-0697-y
Published Online: 2015-04-22
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Cohen, Dena R
Todd, Susan
Gregory, Walter M
Brown, Julia M
License valid from 2015-04-22
Article History
Received: 16 September 2014
Accepted: 31 March 2015
First Online: 22 April 2015