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Contributors Study design/planning: all authors. Data analysis: ABS, HZ, SGM. Interpretation of results: all authors. Preparation of paper: ABS, HZ, SGM. Review of paper: all authors. Revision of manuscript: ABS.
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 SGM has a US patent application for a Multicatheter Infusion System (US-2017-0361063) and is the owner of SGM Consulting. He is a partner in Parvizi Surgical Innovations. None of the afore-mentioned relations influenced the conduct of the present study. All other authors declare that they have no conflicts of interest.
Provenance and peer review Not commissioned; externally peer reviewed.
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