Maps of HRA regions with NESTs. Grey asterisks represent the YSOs in the area, and coloured markers show the position of NESTs. Symbols indicate whether the significant activity of NESTs is significantly different (triangles for larger, and inverted triangles for lower), or consistent with the average (circles). The colour scale shows the ratio of Class 0/I objects assigned to each NEST. Contours show each region’s relative risk map values, and red contours mark the threshold boundaries f̄_C0/I ± σ_fC0/I separating areas with values different from the average control distribution for each region (solid red contour for the upper limit and dashed for the lower).