TY - JOUR T1 - Informing efficient randomised controlled trials: exploration of challenges in developing progression criteria for internal pilot studies. JO - BMJ Open UR - https://eprints.whiterose.ac.uk/id/eprint/113084 UR - https://doi.org/10.1136/bmjopen-2016-013537 PY - 2017/02/01 AU - Avery KNL AU - Williamson PR AU - Gamble C AU - Francischetto EOC AU - Metcalfe C AU - Davidson P AU - Williams H AU - Blazeby JM AU - Blencowe N AU - Bugge C AU - Campbell M et al ED - DO - DOI: 10.1136/bmjopen-2016-013537 PB - BMJ Publishing Group VL - 7 Y2 - 2025/11/10 ER -