Text and Data Mining valid from 2020-02-07
Received: 27 September 2019
Accepted: 21 December 2019
First Online: 7 February 2020
Ethics approval and consent to participate
: The Ethics Committee of the Second Affiliated Hospital of Soochow University approved the study on November 23, 2018, with file number EC-AF (JD)-06/6.1, study protocol version 3.0. The study is designed in accordance with the principles of the Declaration of Helsinki. Written informed consent is obtained from every enrolled patient upon request by the review board.
: Not applicable.
: The authors declare that they have no competing interests.