Secular Trends in Depressive Symptoms in Adolescents in Yunnan, Southwest China From Before COVID-19 to During the COVID-19 Pandemic: Longitudinal, Observational Study
JMIR Public Health Surveill. 2024 Jul 31;10:e52683. doi: 10.2196/52683. ABSTRACT BACKGROUND: Yunnan province borders Myanmar, Laos, and Vietnam, giving it one of the longest borders …