Article History
Received: 11 December 2019
Accepted: 28 May 2020
First Online: 4 June 2020
Ethics approval and consent to participate
: The study (CYCH-IRB 106074) was approved by the ethics committee at Chia-Yi Christian Hospital on September 25, 2017 and it is in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. For this is a retrospective study, informed consent is not required. Details that might disclose the identity of the subjects under study are omitted.
: Not applicable.
: This study does not have a financial relationship with the organization that sponsored the research: The authors declare no conflict of interest.