Received: 21 February 2020
Accepted: 27 May 2020
First Online: 17 June 2020
Ethics approval and consent to participate
: Approval for the study was provided by the local Ethics Committee of Zurich and a consent to participate was given in written form.
: Not applicable.
: One author (PF) is shareholder of the Balgrist CARD AG – a company producing PSI for osteotomies.