00470nas a2200169   4500000000100000000000100001008004100002100001300043700001500056700001300071700001300084700001300097245014000110300001100250490000700261022003200268       2007                            d1 aK. Wurst1 aS. Ephross1 aJ. Loehr1 aD. Clark1 aH. Guess00aEvaluation of the General Practice Research Database congenital heart defects prevalence: comparison to United Kingdom national systems  a309-160 v79  a1542-0752 (Print) 1542-0752