Volume 18 Supplement 2
The ethics of ‘Trials within Cohorts’ (TwiCs): 2nd international symposium
Publication costs were funded by NIHR CLAHRC Yorkshire and Humber. The Supplement Editors declare that they have no competing interests.
London, UK7-8 November 2016
Edited by Clare Relton, Linda Kwakkenbos, James Flory and Merrick Zwarenstein.