Shi, Pengfei
Zhou, Min
Yang, Yonggang
Article History
Received: 18 April 2019
Accepted: 20 July 2019
First Online: 15 August 2019
Compliance with ethical standards
: The Ethical Committee of our hospital approved the protocol of this study. All enrolled patients or their guardians provided written informed consents or verbal agreements with recording.
: The authors declare that they have no competing interests.