Response to Liu et al.

We thank our colleagues for their interest on our study [1] and their critical appraisal, which gives us the opportunity to clarify some important issues.

As already acknowledged in the discussion of our paper, and relevant for any retrospective study, potential selection bias cannot be excluded. However, baseline Izbicki score did not differ among the three groups evaluated in our study.

Publication History

Article published online:
23 March 2020

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