Received: 17 July 2021
Accepted: 8 February 2022
First Online: 24 February 2022
: Ethical approval was obtained from the Beijing Children’s Hospital Research Ethics Committee (reference number: 2020-Z-102). The first page of the survey provided information about the study. Written informed consent was obtained from all subjects involved in the study.
: Not applicable.
: The authors declare no conflict of interest with respect to this study. Professor Mary Fewtrell receives an unrestricted donation for research on infant nutrition from Philips. The remaining authors declare no other conflicts.