Impact of the COVID-19 kindergarten closure on overweight and obesity among 3- to 7-year-old children.

"Declarations Ethical approvalThis work was approved by the Institutional Review Board of School of Public Health, Fudan University, Shanghai, China (IRB No. 2020-12-0862). Conflict of interestNo financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. The authors have no conflict of interest to declare. Conflict of interest No financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. The authors have no conflict of interest to declare."

"Funding This study was funded by the Program of Public Health Outstanding Scholars, Jiading District, Shanghai Discipline Leadership Scholars, the Fifth Round of the Three-Year Public Health Action Plan of Shanghai Key Discipline Program (GWV-10.1-XK08), and the Shanghai Municipal Public Health Outstanding Discipline Leadership Program (GWV-10.2-XD10)."