Fig. 5From: A systematic review of the development and application of home cage monitoring in laboratory mice and ratsHistorical change in the number of custom-built and commercially available home cage monitoring (HCM) systems. More than one system could be applied in a study. In n = 126 cases custom-built HCM systems and in n = 219 cases commercially available HCM systems were used (multiple HCM systems were applied in n = 28 studies). Studies in which no HCM system was used were excluded from this figureBack to article page