Werner, Simone
Chen, Hongda
Butt, Julia
Michel, Angelika
Knebel, Phillip
Holleczek, Bernd
Zörnig, Inka
Eichmüller, Stefan B.
Jäger, Dirk
Pawlita, Michael
Waterboer, Tim
Brenner, Hermann
Article History
Received: 20 January 2016
Accepted: 18 April 2016
First Online: 3 May 2016
Competing interests
: The authors declare no competing financial interests.