Funding for this research was provided by:
Smith & Nephew
Article History
Received: 4 June 2019
Accepted: 10 January 2020
First Online: 21 January 2020
Ethics approval and consent to participate
: The study was conducted adhering to the Declaration of Helsinki and its later amendments. Ethical approval was obtained from ethics committees at Charité Universitaetsmedizin Berlin (EA1/114/18), Germany. All participants gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.