Received: 5 October 2020
Accepted: 23 November 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: The study was approved by the HCA Institutional Review Board (IRB) Manager system (Protocol no: 2020-551). The requirement for written informed consent was waived as the obtained data was de-identified and the study was an observational retrospective cohort.
: Not applicable
: None. The authors declare no competing interests.