Liu, Bao ying
Liu, Jin
Zhang, Di
Yang, Zhi lei
Feng, Ya ping
Wang, Meng
Funding for this research was provided by:
Youth Fund of The First Affiliated Hospital of Zhengzhou University (YNQN2017064)
Article History
Received: 2 March 2020
Accepted: 17 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: Ethic approval was gain from the ethics committee of The First Affiliated Hospital of Zhengzhou University (NO. 2018-ky-35). Written informed consent from parents or guardians were obtained prior to any clinical examination or sampling.
: Not applicable.
: We have no competing interests.