Received: 7 January 2021
Accepted: 19 May 2021
First Online: 4 June 2021
: The authors declare that they have no conflict of interest.
: This retrospective study was approved by the institutional review board (IRB). For this type of study formal consent is not required.
: This study has obtained IRB approval from H Plus <i>Yangji</i> Clinical Research Center and the need for informed consent was waived.
: For this type of study consent for publication is not required.