Article History
Received: 22 February 2021
Accepted: 28 May 2021
First Online: 5 June 2021
Declarations
:
: The study was approved by the Ethics Committee of Jinan Central Hospital Affiliated to Shandong University. Signed written informed consents were obtained from the patients and/or guardians.
: Not applicable.
: The authors declare that they have no competing interests.