Zhang, Heng
Liao, Zhiyi
Hao, Xiaolei
Han, Zhe
Li, Chunde
Gong, Jian
Liu, Wei
Tian, Yongji
Funding for this research was provided by:
Natural Science Foundation of Beijing Municipality (7172041)
Article History
Received: 26 December 2018
Accepted: 27 January 2019
First Online: 6 February 2019
Compliance with ethical standards
: Before the investigation, we received the approval of the Ethics Review Committee of the Beijing Tiantan Hospital
: The authors declare that they have no conflict of interest.