Funding for this research was provided by:
National Center for Chronic Disease Prevention and Health Promotion (3 R49 CE002106-05S1)
National Natural Science Foundation of China (81903407)
Received: 6 September 2020
Accepted: 16 September 2020
First Online: 24 September 2020
Ethics approval and consent to participate
: The Institutional Review Board of the Nationwide Children’s Hospital granted approval of waiver of informed consent for this research (IRB18–01171). A waiver of informed consent was obtained under 45 CFR 46.116(d) and a waiver of HIPAA Authorization was granted under 45 CFR 164.512(i). A Data User Agreement was acquired by our team to access the data used in this study.
: Not applicable.
: The authors declare that they have no conflict of interests.