Received: 8 February 2020
Accepted: 23 July 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The study was carried out in accordance with the principles stated in the Declaration of Helsinki, and approved by the Ethical Committee of National Taiwan University Hospital (NTUH-IRB No. 201504056RINB). The Review Board approved to waive inform consent due to the retrospective study design and the research posing no more than minimal risk.
: Not applicable.
: The authors declared no conflict of interest.