Article History
Received: 23 November 2018
Accepted: 5 March 2019
First Online: 18 March 2019
Ethics approval and consent to participate
: Ethical approval for China Ethics Committee of Registering Clinical Trials (ChiECRCT-2,016,043) and registered in the Chinese Clinical Trial Registry (ChiCTR-INR-16009162, date of registration: 2016-9-5) prior to patient enrollment. Written informed consent was abtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.