Pietka, Wojciech
Sundnes, Olav
Hammarström, Clara
Zucknick, Manuela
Khnykin, Denis
Haraldsen, Guttorm
Article History
Received: 28 January 2020
Accepted: 20 March 2020
First Online: 15 April 2020
Competing interests
: The authors declare no competing interests.