Fig. 3From: Substance P concentrations in the blood plasma and serum of adult cattle and calves during different painful procedures and conditions – a systematic reviewDemographic overview of range of publication year and origin of studies (country) in references about Substance P concentrations during painful procedures, conditions, and diseases in adult cattle (dark green) and calves (light green). The largest number of studies was published in 2018, and most studies originated from the United States of America (USA) or CanadaBack to article page