Liu, Hongyun
Yang, Zhao
Meng, Fangang
Guan, Yuguang
Ma, Yanshan
Liang, Shuli
Lin, Jiuluan
Pan, Longsheng
Zhao, Mingming
Hao, Hongwei
Luan, Guoming
Zhang, Jianguo
Li, Luming
Article History
Received: 18 July 2018
Accepted: 8 October 2018
First Online: 16 October 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: The study protocol was approved by the Institutional Review Committee of Beijing Tiantan Hospital Capital Medical University (No. qx2014-010-02), and all subjects (or parents/guardians of subjects) provided written informed consent.