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The study was double-blinded. The investigation drug and placebo had an identical appearance. The study remained blinded to all individuals (including patients, investigators, and study personnel) until the time of prespecified unblinding, except for the statistician who provided the randomization sequence. The randomization list and blinding codes will be kept strictly confidential.
Copyright and License information: ©2020 Wei Xu et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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