Funding for this research was provided by:
Innovation guidance project of clinical medicine technology, Hunan provincial science and technology department (No.2018SK50715)
Article History
Received: 28 May 2019
Accepted: 24 September 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.