Heyd, Robert
Eis-Hübinger, Anna Maria
Berger, Annemarie
Bierbaum, Sibylle
Pietzonka, Sandra
Wenzel, Jürgen J.
Huzly, Daniela
Keppler, Oliver T.
Panning, Marcus
Article History
Received: 2 September 2016
Accepted: 13 March 2017
First Online: 18 March 2017
Compliance with ethical standards
:
: Ethical clearance for the whole study was obtained at Freiburg University and individually at each participating study center.
: No conflict of interest to declare by all authors.
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