Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST105-2634-B-006-001, MOST103-2320-B-006-030-MY3, NSC105-2314-B-006-004)
Ministry of Health and Welfare (MOHW105-TDU-M-212-000006)
Text and Data Mining valid from 2018-04-02
Received: 15 August 2017
Accepted: 22 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of National Cheng Kung University Hospital (approval no. A-ER-104-386 and B-ER-104-178) and all participants were enrolled to the study after signing informed consent.
: Consent for the publication of identifying images or other personal or clinical details of participants that compromise anonymity is “Not applicable”. All authors have read the manuscript and approve the manuscript to be published.
: All authors declare that they have no competing interests. However, Guey Chuen Perng is a member of editorial board of BMC Infectious Diseases.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.