Funding for this research was provided by:
French Ministry of Agriculture
France veterinaire international
French Embassy in Vietnam
Received: 26 June 2018
Accepted: 6 September 2018
First Online: 24 September 2018
Ethics approval and consent to participate
: Ethical approval in the low-risk category was granted from the ethical review board for biomedical research of the Hanoi University of Public Health (Vietnam). Consent to participate has been collected through the signature of an informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.
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