Funding for this research was provided by:
Beijing Municipal Science & Technology Commission (NO:Z151100004015053)
Received: 24 September 2019
Accepted: 13 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The study had been approved by the ethical committee of the participating hospitals. All subjects signed informed consent by each patient. All clinical investigations had been conducted according to the principles expressed in the Declaration of Helsinki.
: Consent for publication was obtained from every individual whose data are included in this manuscript.
: The authors declare that they have no competing interests.