Sprenger, Florian D.
Siegenthaler, Lea
Kneubuehl, Beat P.
Jackowski, Christian
Article History
Received: 16 June 2015
Accepted: 16 September 2015
First Online: 8 October 2015
Conflict of interest
: The authors declare that they have no competing interests.
: Ethics approval and consent to participate
: 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. Informed consent was obtained from all individual participants included in the study.