Lu, Qing
Yan, Hailin
Wang, Yilan
Lei, Tiantian
Zhu, Linlin
Ma, Hongsheng
Yang, Jinlin
Article History
Received: 12 July 2018
Accepted: 30 May 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: This study was retrospectively registered and approved by the Ethics Committee of West China Hospital of Sichuan University (IRB number: ChiCTR1800016321). Consent to participate was waived due to the fact that this is a retrospectively study with no risk to participants, where the research will not affect the rights or welfare of the participants.
: Not applicable.
: Qing Lu, Hailin Yan, Yilan Wang, Tiantian Lei, Linlin Zhu, Hongsheng Ma, Jinlin Yang have no conpeting interest or financial ties to disclose.