Sługocki, Łukasz
Karpowicz, Maciej
Kaczmarczyk-Ziemba, Agnieszka
Kozłowska, Joanna
Spikkeland, Ingvar
Nilssen, Jens Petter
Article History
Received: 1 April 2020
Accepted: 21 May 2020
First Online: 12 June 2020
Competing interests
: The authors declare no competing interests.