Niemczura, Ewa
Hümmerich, Stefan
Castelli, Fiorella
Paunzen, Ernst
Bernhard, Klaus
Hambsch, Franz-Josef
Hełminiak, Krzysztof http://orcid.org/0000-0002-7650-3603
Article History
Received: 12 May 2017
Accepted: 6 June 2017
First Online: 19 July 2017
Competing Interests
: The authors declare that they have no competing interests.