Loca, Dagnija
Smirnova, Anastasija
Locs, Janis
Dubnika, Arita
Vecstaudza, Jana
Stipniece, Liga
Makarova, Elina
Dambrova, Maija
Article History
Received: 22 May 2018
Accepted: 1 November 2018
First Online: 13 November 2018
Competing Interests
: The authors declare no competing interests.