Baur, T.
Stauffer, V. K.
Vogt, A. P.
Kauf, P.
Schmid, M.
Luedi, M. M.
Doll, D.
Article History
First Online: 11 April 2019
Compliance with ethical guidelines
:
: T. Baur, V.K. Stauffer, A.P. Vogt, P. Kauf, M. Schmid, M.M. Luedi, and D. Doll declare that they have no competing interests. This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors and their relatives have no relevant or minor financial relationships with external companies.
: We did not carry out research with human participants. Therefore, no informed consent was needed prior to preparation of the current manuscript.