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Article History

Received: 4 March 2020

Accepted: 6 October 2020

First Online: 18 October 2020

Compliance with ethical standards

: This study was approved by the local EC (Ethikkommission Nordwest- und Zentralschweiz, EKNZ, Nr. 2012-036). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript. None of the authors received financial compensation for the work related to the study.