Kumar, Hirdesh
Sattler, Julia Magdalena
Singer, Mirko
Heiss, Kirsten
Reinig, Miriam
Hammerschmidt-Kamper, Christiane
Heussler, Volker
Mueller, Ann-Kristin
Frischknecht, Friedrich
Article History
Received: 30 January 2016
Accepted: 9 May 2016
First Online: 31 May 2016
Competing interests
: The authors declare no competing financial interests.