Check on the Zoonoses & Public Health Issue on Systematic Reviews and Meta-Analysis in Animal Agriculture and Veterinary Medicine !
See especially the article on searching the literature, written by Kate Anderson, Head of the Zalk Veterinary Medical Library (aka yours truly…):
O’Connor AM, Anderson KM, Goodell CK, Sargeant JM. Conducting systematic reviews of intervention questions I: Writing the review protocol, formulating the question and searching the literature. Zoonoses and Public Health 2014;61 Suppl 1:28-38 doi: 10.1111/zph.12125. PMID: 24905994.