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Contributors Both the authors have contributed equally to this study.
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 The authors, AUR and KV are stated as the inventors and applicants in the published patent applications US15/177,347 and PCT/IB2016/053899 with National Phase Entry into European Patent Office, Canada and India. The technique and device are also patented in Australia.
Provenance and peer review Not commissioned; externally peer reviewed.