Li, Wei-ning
Du, Xiu-juan
Zhang, Yu-ting
Wang, Le-yi
Zhu, Jing
Article History
Received: 8 February 2021
Accepted: 7 August 2021
First Online: 16 August 2021
Declarations
:
: This study was approved by the Medical Ethics Review Board at Qilu Hospital of Shandong University. The study was performed in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration, and its later amendments or comparable ethical standards. Informed consent was obtained from all participants.
: Written informed consents were obtained from all participants for publication of this study and any accompanying images.
: The authors declare that they have no competing interests.