Galván, J A
Zlobec, I
Wartenberg, M
Lugli, A
Gloor, B
Perren, A
Karamitopoulou, E
Article History
Received: 6 January 2015
Revised: 16 April 2015
Accepted: 28 April 2015
First Online: 19 May 2015
Competing interests
: The authors declare no conflict of interest.