Borer, Joëlle
Schwarz, Jochen
Potthast, Silke
Jakob, Marcel
Lenzlinger, Philipp
Zingg, Urs
Babians, Arby
Article History
Received: 21 December 2018
Accepted: 10 January 2019
First Online: 14 January 2019
Compliance with ethical standards
:
: Joëlle Borer, Arby Babians, Jochen Schwarz, Silke Potthast, Marcel Jakob, Philipp Lenzlinger, and Urs Zingg declare that they have no conflict of interest.