Goławski, C
Dłużniewski, M
Kostarska-Srokosz, E
Nowosielski, K
Syska-Sumińska, J
Chmielewski, M
Kowalczyk, R
Article History
Received: 17 May 2015
Revised: 1 March 2017
Accepted: 20 March 2017
First Online: 20 April 2017
Competing interests
: The authors declare no conflict of interest.