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Contributors CJR and RB developed the project and lead the guideline development group. All other authors were members of the Guideline Development Group, reviewed the original manuscript of the position statement and have reviewed and given input into this letter.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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