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Article History

Received: 12 December 2018

Accepted: 20 March 2019

First Online: 29 March 2019

Compliance with ethical standards

: Data collection was conducted in accordance with the ethical standards set forth by the ethics commission of the Charité University Hospital in Berlin (EA 2/135/14), local ethics committees, and the Declaration of Helsinki.

: TP has served as speaker for NexStim Oy. GL, HS, and SL 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.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (name of institute/committee) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

: Informed consent was obtained from all individual participants included in the study.