If you are or have been involved with randomised controlled trials, we would very much appreciate your input by taking a few minutes to
complete the straightforward on-line survey at the following link: https://www.hsytu.york.ac.uk/trialsurvey/quest.aspx.
The survey is concerning how random allocation can be undermined through deliberate manipulation of the randomisation sequence or by technical
error. We emphasise that everyone’s anonymity will be preserved and the information received will only be used to summarise the types of
technical errors and methods of manipulation that occur. If you have any queries, please do not hesitate to contact us at: [log in to unmask]
Please could you complete the survey by the 6th March and forward this email on to anyone who you think would be interested in taking part in
the survey.
Many thanks in advance
Catherine Hewitt and David Torgerson
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