Funding for this research was provided by:
the U.S. National Institute of Environmental Health Science (R01ES029082)
Received: 14 May 2020
Accepted: 25 September 2020
First Online: 19 October 2020
Ethics approval and consent to participate
: The study protocol was approved by the Human Ethics Committee of the Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology. All participants provided oral informed consent before the telephone interview.
: The authors declare no conflict of interest.