Tong, Xianzeng
Bao, Kunyang
Hu, Peng
Hong, Tao
Li, Meng
Zhang, Peng
Zhang, Hongqi
Article History
Received: 4 July 2018
Accepted: 31 August 2018
First Online: 24 September 2018
Compliance with ethical standards
: This study was approved by the Institutional Review Board of Xuanwu Hospital, Capital Medical University.
: The authors declare that they have no conflict of interest.
: This study is a retrospective study. For this type of study, formal consent is not required.
: Informed consent was obtained from the patient and her relatives.