Fig. 2From: Substance P concentrations in the blood plasma and serum of adult cattle and calves during different painful procedures and conditions – a systematic reviewPublication number diagram for the selection of studies for a systematic review for the evaluation of Substance P concentrations during different painful procedures, conditions, and diseases in adult cattle and calves. Number of studies was reduced from 236 identified studies to 36 studies included in this systematic review (n = 11 for adult cattle and n = 25 for calves) Back to article page