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Response to Berlaimont and Welby

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  • Handling editor Anna Maria Geretti

  • Contributors This letter was initiated and drafted by MC, DM and KS. HM was responsible for the source data included in the original analysis. All authors contributed to and approved the final draft of the letter.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; internally peer reviewed.