Funding for this research was provided by:
The General Commission for Agricultural Research, Syria
Received: 20 May 2020
Accepted: 9 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: The study was reviewed and approved by the Ethics Committee of the General Commission for Scientific Agricultural Research of Syria. All farmers in this study gave verbal consent to use their broiler flocks for research purposes, and the ethics committee approved this procedure.
: Not applicable.
: The authors declare that they have no competing interests.