Cobet, Christoph
Gasiorowski, Jacek
Menon, Reghu
Hingerl, Kurt
Schlager, Stefanie
White, Matthew S.
Neugebauer, Helmut
Sariciftci, N. Serdar
Stadler, Philipp
Article History
Received: 11 December 2015
Accepted: 23 September 2016
First Online: 12 October 2016
Competing interests
: The authors declare no competing financial interests.