Physical, psychological, and behavioral problems among children and adolescents in countries with different economic statuses during the COVID-19 pandemic: a systematic review and... by Bo Peng, Bo Peng, Kara K. L. Reeves, Kara K. L. Reeves, Shara W. Y. Lee, Tina H. Y. Chung, Heidi W. L. Hui, Alfred H. L. Leung, Johnson C. Y. Pang, Johnson C. Y. Pang

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The impacts of physical activity on psychological and behavioral problems, and changes in physical activity, sleep and quality of life during the COVID-19 pandemic in preschoolers,... by Johnson C. Y. Pang, Eric L. S. Chan, Herman M. C. Lau, Kara K. L. Reeves, Tina H. Y. Chung, Heidi W. L. Hui, Alfred H. L. Leung, Allan C. L. Fu, Allan C. L. Fu, Allan C. L. Fu

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