Funding for this research was provided by:
National Natural Science Foundation of China (81702999)
Health and Family Planning commission of Shaanxi province (2017SF-208)
Received: 12 May 2018
Accepted: 2 April 2019
First Online: 30 April 2019
Ethics approval and consent to participate
: This manuscript reporting studies involved human participants. The study was approved by our hospital’s institutional review board, and a written informed consent was given by all patients before receiving combination therapy according to the institutional guidelines.
: Not applicable.
: The authors declare that they have no competing interests.
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