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Hedin, Gita and Norell-Clarke, Annika and Hagell, Peter and Tønnesen, Hanne and Westergren, Albert and Garmy, Pernilla (2020) Insomnia in relation to academic performance, self-reported health, physical activity, and substance use among adolescents. International Journal of Environmental Research and Public Health, 17, (17), 6433. doi: 10.3390/ijerph17176433.