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Article History

Received: 6 May 2019

Accepted: 27 August 2019

First Online: 4 September 2019

Ethics approval and consent to participate

: The study was approved by the local Institutional Review Board and the local Medical Ethical Committee (University Hospital Zürich). General consent was obtained according to the institutional guidelines.

: General consent was obtained according to the institutional guidelines.

: None of the authors have any conflicts of interests to declare. The authors received no pharmaceutical or industrial support for this study. No further direct or indirect financial support or other assets were transferred to the authors or their family members for this study.There was no type of support by the industrial producer of the implants used in this study, including grant support, financial reimbursement for travel, speaker fees, stocks and bonds, or any other financial or otherwise relevant relationship with this particular vendor. None of these conflicts exist for any of the authors. We are stating and emphasizing the absence of any conflict in order to avoid any perception of industrial bias.