Temporal Trends in Cardiovascular Health Status Among Chinese School-Aged Children From 1989 to 2018: Multiwave Cross-Sectional Analysis - Xijie Wang; Bin Dong; Feifei Huang; Ji Zhang; Rongxin He; Shufa Du; Jiguo Zhang; Jun Ma; Huijun Wang; Bing Zhang; Wannian Liang (JMIR Public Health and Surveillance, 2023)