Steiner, Bernhard
Masood, Rahim
Rufibach, Kaspar
Niedrist, Dunja
Kundert, Oliver
Riegel, Mariluce
Schinzel, Albert
Article History
Received: 3 January 2014
Revised: 1 May 2014
Accepted: 30 May 2014
First Online: 9 July 2014
Competing interests
: The authors declare no conflict of interest.