Text and Data Mining valid from 2019-01-05
Received: 21 May 2018
Accepted: 27 December 2018
First Online: 5 January 2019
Ethics approval and consent to participate
: Because this study constituted public health surveillance rather than research in human beings, ethical approval from institutional review boards was waived by the ethic committee of Dandong International Travel Healthcare Center. Data collected from participants in this study are required by WHO’s International Health Regulations and the Frontier Health and Quarantine Law of China, consent to participate was not needed [CitationRef removed, CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.
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