Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (NSC 105-2314-B-006 -004, MOST 105-2634-B-006-001, MOST 103-2320-B-006-030- MY3)
Ministry of Health and Welfare (MOHW105-TDU- M-212-000006)
Text and Data Mining valid from 2019-04-24
Received: 7 October 2018
Accepted: 2 April 2019
First Online: 24 April 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of National Cheng Kung University Hospital, Tainan, Taiwan. (IRB approval no. A-ER-104-386 and B-ER-104-178). The study objectives and procedures were explained to the participants before obtaining written consent.
: Not applicable.
: All authors declare that they have no competing interests. Guey Chuen Perng is an editorial board member of BMC Infectious Diseases.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.