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Authors
Zhu, Qiao https://orcid.org/0000-0001-8327-2017
Yao, Yao
Ning, Chao-Xue
Chen, Xiao-Ping
Luan, Fu-Xin
Liu, Liang
Liu, Qiong
Wang, Na
Zhang, Fu
Zhao, Ya-Li
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Funding
Funding for this research was provided by:
Key Research and Development Project of Hainan (ZDYF2016135, ZDYF2017095)
Natural Science Foundation of Hainan Province (817360)
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Article History
Received: 1 May 2018
Accepted: 7 May 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: Prior to investigation and physical examination, we have got the consent from the participants or from their family members such as sons and daughter-in-laws. If the participants could not sign their names because of illiteracy or being cognitive-impaired, their names were signed by their direct relatives after the consent of the participants. The Ethics Committee of the Hainan branch of PLA General Hospital (Sanya, Hainan) approved the study protocol (No. of serial: 301HNLL-2016-01).
: Not applicable.
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
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