Link, Alexander
Schirrmeister, Wiebke
Langner, Cosima
Varbanova, Mariya
Bornschein, Jan
Wex, Thomas
Malfertheiner, Peter
Article History
Received: 29 September 2014
Accepted: 14 January 2015
First Online: 5 February 2015
Competing interests
: The authors declare no competing financial interests.