Yu, Xin
Zheng, Heyi
Article History
Received: 17 April 2017
Accepted: 27 February 2018
First Online: 7 March 2018
Compliance with ethical standards
: All experimental protocols were approved by the Clinical Research Ethics Committee of the Peking Union Medical College Hospital. All patients gave written consent on the study. Data were collected from patients after obtaining approval from the Clinical Research Ethics Committee of the Peking Union Medical College Hospital and fully informed written consent from the patients.