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Alkhaffaf, Bilal, Metryka, Aleksandra, Blazeby, Jane M, Glenny, Anne-Marie, Williamson, Paula R 
ORCID: 0000-0001-9802-6636 and Bruce, Iain A
(2021)
How are trial outcomes prioritised by stakeholders from different regions? Analysis of an international Delphi survey to develop a core outcome set in gastric cancer surgery.
PLOS ONE, 16 (12).
e0261937-.
Alkhaffaf, Bilal and Kirkham, Jamie ORCID: 0000-0003-2579-9325
(2022)
Meeting the ongoing challenges of outcome selection in surgical oncology trials.
BRITISH JOURNAL OF SURGERY, 109 (7).
pp. 563-565.
Alkhaffaf, Bilal, Blazeby, Jane M, Metryka, Aleksandra, Glenny, Anne-Marie, Adeyeye, Ademola, Costa, Paulo Matos, del Val, Ismael Diez, Gisbertz, Suzanne S, Guner, Ali, Law, Simon et al (show 13 more authors)
(2021)
Methods for conducting international Delphi surveys to optimise global participation in core outcome set development: a case study in gastric cancer informed by a comprehensive literature review.
TRIALS, 22 (1).
410-.
Alkhaffaf, Bilal, Blazeby, Jane M, Williamson, Paula R ORCID: 0000-0001-9802-6636, Bruce, Iain A and Glenny, Anne-Marie
(2018)
Reporting of outcomes in gastric cancer surgery trials: a systematic review.
BMJ OPEN, 8 (10).
e021796-.
Alkhaffaf, Bilal, Glenny, Anne-Marie, Blazeby, Jane M, Williamson, Paula ORCID: 0000-0001-9802-6636 and Bruce, Iain A
(2017)
Standardising the reporting of outcomes in gastric cancer surgery trials: protocol for the development of a core outcome set and accompanying outcome measurement instrument set (the GASTROS study).
TRIALS, 18 (1).
370-.
Fish, Rebecca, MacLennan, Steven, Alkhaffaf, Bilal and Williamson, Paula R ORCID: 0000-0001-9802-6636
(2020)
"Vicarious thinking" was a key driver of score change in Delphi surveys for COS development and is facilitated by feedback of results.
J Clin Epidemiol, 128.
pp. 118-129.