School and class closures and adolescent mental health during the second and later waves of the COVID-19 pandemic in Finland: a repeated cross-sectional study
- Arja Rimpelä
- , Heidi Kesanto-Jokipolvi
- , Anna Myöhänen
- , Lauri Heikonen
- , Sanna Oinas
- , Raisa Ahtiainen
Research output: Contribution to journal › Article › Scientific › peer-review
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