Cui, Xuewei
Shi, Yongyan
Gao, Siyang
Xue, Xindong
Fu, Jianhua
Article History
Received: 29 March 2019
Accepted: 11 September 2019
First Online: 9 November 2019
Ethics approval and consent to participate
: The study was approved by the Medical Ethics Committee of Shengjing Hospital of China Medical University.
: Informed consent was obtained from the infants’ parents.
: The authors declare that they have no competing interests.