Funding for this research was provided by:
Center for Infectious Disease and Cancer Research, Kaohsiung Medical University (KMUTP105-E01)
Kaohsiung Medical University Research Foundation (105KMUOR02)
Taiwan Centers for Disease Control (MOHW 106-CDC-C-114-000115)
Received: 3 December 2017
Accepted: 24 April 2018
First Online: 3 May 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Kaohsiung Medical University Hospital [KMUHIRB-SV (II)-20170043], and it adhered to the principles of the Declaration of Helsinki. Because the data were analyzed anonymously, the ethical committee waived the need for written consent.
: The authors declare that they have no competing interests.
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