Funding for this research was provided by:
Regional Universities Forum for Capacity Building in Agriculture (RUFORUM) grant award (RU 2014 GRG-086)
Received: 13 March 2020
Accepted: 23 April 2020
First Online: 29 April 2020
Ethical approval and consent to participate
: The University of Nairobi Ethical Research Committee approved surveillance procedures and instruments.
: Not applicable.
: None declared.