Lewandowski, Wiktor https://orcid.org/0000-0002-3503-2120
Fruhnert, Martin
Mieczkowski, Józef
Rockstuhl, Carsten
Górecka, Ewa
Article History
Received: 18 September 2014
Accepted: 10 February 2015
First Online: 17 March 2015
Competing interests
: The authors declare no competing financial interests.