He, Wei
Chen, Xiaoxu
Ji, Haiyong
Wang, Jianwei
Niu, Zhihong
Article History
Received: 2 December 2019
Accepted: 23 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: The study involving human participants was approved by the institutional review board of Shandong Provincial Hospital (No. 2019–151). Written consent was obtained from all the participants. The methods were carried out in accordance with the approved guidelines. All clinical research was performed on the basis of the principles expressed in the Declaration of Helsinki.
: Not applicable.
: The authors Wei He, Xiaoxu Chen, Haiyong Ji, Jianwei Wang, and Zhihong Niu declare that they have no conflict of interest financial or otherwise to disclose.