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Avery, Kerry NL, Williamson, Paula R 
ORCID: 0000-0001-9802-6636, Gamble, Carrol, Francischetto, Elaine O'Connell, Metcalfe, Chris, Davidson, Peter, Williams, Hywel, Blazeby, Jane M and Sup, Internal Pilot Trials Workshop
(2017)
Informing efficient randomised controlled trials: exploration of challenges in developing progression criteria for internal pilot studies.
BMJ OPEN, 7.