Zhou, Ling
Lu, Dao-pei
Funding for this research was provided by:
Shanghai City Health Bureau (20124209)
Article History
Received: 13 February 2018
Accepted: 21 January 2019
First Online: 8 February 2019
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of Shanghai Dao-Pei Hospital. Informed consent was obtained from the study participants.
: Not applicable.
: The authors declare that they have no competing interests.
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