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Contributors MP wrote the manuscript, analyzed the data and made substantial contributions to the design of the manuscript. CAB made substantial contributions to the acquisition of the data. MCC made substantial contributions to the concept and design of the manuscript. All authors approved the final version of the manuscript.
Competing interests None declared.
Patient consent Obtained.
Ethics approval Ethikkommission Nordwest- und Zentralschweiz.
Provenance and peer review Not commissioned; externally peer reviewed.
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