Figure 4From: Spatial patterns of the congenital heart disease prevalence among 0- to 14-year-old children in Sichuan Basin, P. R China, from 2004 to 2009 HotspotsDetected by Getis ' s G i * . It is the hotspots map of CHD prevalence detected by Getis ' s G i * statistics at different distance thresholds. (a) distance threshold = 3.71 km, (b) distance threshold = 12.27 km, (c) distance threshold = 22.70 km, (d) distance threshold = 35.49 km.Back to article page