Szpecht, Dawid
Gadzinowski, Janusz
Seremak-Mrozikiewicz, Agnieszka
Kurzawińska, Grażyna
Szymankiewicz, Marta
Article History
Received: 24 October 2016
Accepted: 9 January 2017
First Online: 13 February 2017
Competing interests
: The authors declare no competing financial interests.