Funding for this research was provided by:
WHO/TDR (Re-entry grant B40104)
Received: 11 March 2020
Accepted: 4 September 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: Not applicable. However, verbal consent was received from farmers after the study aim and objectives were explained to them.
: Not applicable.
: The authors declare that they have no competing interests.