Funding for this research was provided by:
Biotechnology and Biological Sciences Research Council (BB/L024209/1)
Bill and Melinda Gates Foundation (03011000075)
Received: 21 December 2018
Accepted: 10 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: All animal experimentation was carried out within a project license granted by the UK Home Office under the Animal (Scientific Procedures) Act 1984, license 70/7737, and were approved by the APHA Animal Welfare and Ethical Approval Board.
: Not applicable.
: The authors declare that they have no competing interests.
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