Key points are not available for this paper at this time.
aDepartment of Cardiothoracic Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi, China bDepartment of Cardiothoracic Surgery, Guangxi International Zhuang Medicine Hospital, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi, China This article does not refer to any raw data. Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article. Published online ■ ■ *Corresponding author. Address: Guangxi Medical University First Affiliated Hospital: The First Affiliated Hospital of Guangxi Medical University CHINA. E-mail: email protected (B. Zheng). This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0/
Liu et al. (Wed,) studied this question.