Wen, Jiangping
Hao, Jie
Zhang, Ye
Cao, Kai
Zhang, Xiaohong
Li, Jiang
Lu, Xinxin
Wang, Ningli
Funding for this research was provided by:
National Basic Research Program of China (973 Program)
the Ministry of Science and Technology of China (Grant 2007CB512201)
the Foundation of the Beijing Tongren Hospital (Grant 2005)
Article History
Received: 1 March 2019
Accepted: 29 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the Helsinki Declaration and approved by the Ethics Committee of Beijing Tongren Hospital (approval number # TREC2006–22). Written informed consent was obtained from all subjects. The right forefinger stamp was considered a signature substitute for illiterate people, which has been approved by the Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.