Strasheim W, Etter EMC, Lowe M, Perovic O. Method to Assess Farm-Level Vaccine and Antibiotic Usage Utilizing Financial Documentation: A Pilot Study in a Commercial Pig Farm in South Africa From 2016 to 2018. Front Vet Sci. 2022;9:856729. https://doi.org/10.3389/fvets.2022.856729