Funding
This work was supported by the NCKU Epidemic Prevention Scientific
Research Center, Ministry of Science and Technology of Taiwan (MOST
111-2321-B006-009) and funded by grant from the National Cheng Kung
University Hospital (NCKUH -11109022). The funders had no role in
designing and conducting the study, in collecting and interpreting the
data or in the decision to submit the work for publication.