Funding for this research was provided by:
Institute of Health and Sports Science and Medicine, Juntendo University
Science and Technology Commission of Shanghai Municipality (16080503100, 18DZ1200600)
Faculty of Health and Sports Science, Juntendo University
Received: 2 May 2020
Accepted: 17 September 2020
First Online: 28 September 2020
Ethics approval and consent to participate
: This study was approved by the Shanghai Nutrition Society Medical Ethics Committee (No.2019–007) on July 11, 2019, and the participants’ confidentiality was strictly maintained throughout the study. No potential conflicts of interest were declared as well. Written study information and informed consent forms were sent to the participants’ parents by the study team. In addition, teachers in each kindergarten received the study introduction content. The children were formally included in the study when the informed consent forms were received.
: Not Applicable.
: The authors declare that they have no competing interests.