*Pharmacy Department, The Second Hospital of Hebei Medical University, Shijiazhuang City, Hebei Province, China; and

†The University of Hong Kong, Hong Kong, China.

Correspondence: Xiuju Liu, The Second Hospital of Hebei Medical University, No. 215, Heping West Road, Shijiazhuang City, Hebei Province 050000, China (e-mail: [email protected]).

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

The authors report no conflicts of interest.

Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.jcvp.org).

X. Liu, Q. Sun, and W. Cui designed the study. Q. Sun, W. Cui, G. Huang, and W. He extracted the data. Yonghong Zhao, Xiaojuan Zhao, and Dan Li evaluated the quality of the included studies. X. Zhang and Y. Tian verified the data. X. Liu, Q. Sun, and W. Cui analyzed the data and wrote the manuscript. All authors read and approved the final manuscript. All authors contributed to the article and approved the submitted version.

This article is a secondary literature and does not involve human or animal subjects. Therefore, ethical approval is not required.

Data available on request from the authors: the data that support the findings of this study are available from the corresponding author upon reasonable request.

Q. Sun, W. Cui have contributed equally.