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It is remarkable that in a randomised trial, when only chance may have introduced differences between groups, authors go out of their way to present a long list of baseline
characteristics to lend credibility to the fairness of comparing outcome occurrence between groups, where here, in a non-randomised comparison of patients from different centres who clearly do differ, authors have not made the slightest effort to present such baseline characteristics. The reviewer can only come to the conclusion that the comparison
with the control group is meaningless.
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