Comparative Analysis of Sleep Hygiene and Patterns among Adolescents in Two Russian Arctic Regions: A Pilot Study oleh Sergey N. Kolomeichuk, Lyudmila S. Korostovtseva, Artem V. Morozov, Michail V. Bochkarev, Yury V. Sviryaev, Dina A. Petrashova, Victoria V. Pozharskaya, Alexander A. Markov, Michail G. Poluektov, Denis G. Gubin