Figure 2From: 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 CHD Prevalence Map Before and After Adjustment by HB. (a) is the map of CHD prevalence before adjusted by HB model, (b) is the map of CHD prevalence after adjusted by HB model.Back to article page