Schneider, Christoph
Wicki, Simone
Graeter, Stefanie
Timcheva, Tankica M.
Keller, Christian W.
Quast, Isaak http://orcid.org/0000-0001-6517-8537
Leontyev, Danila
Djoumerska-Alexieva, Iglika K.
Käsermann, Fabian
Jakob, Stephan M.
Dimitrova, Petya A.
Branch, Donald R.
Cummings, Richard D.
Lünemann, Jan D.
Kaufmann, Thomas http://orcid.org/0000-0001-9906-874X
Simon, Hans-Uwe
von Gunten, Stephan http://orcid.org/0000-0002-2753-8738
Article History
Received: 1 June 2016
Accepted: 30 March 2017
First Online: 2 May 2017
Competing Interests
: The authors declare that they have no competing interests.