Langenauer, J.
Betschart, P.
Hechelhammer, L.
Güsewell, S.
Schmid, H. P.
Engeler, D. S.
Abt, D.
Zumstein, V.
Article History
Received: 2 April 2018
Accepted: 18 May 2018
First Online: 29 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: General consent for data usage was obtained from all individual participants included in the study.
: All procedures performed in the study were in accordance with the ethical standards of the local research committee and with the 1964 Helsinki declaration and its later amendments.
: None.