f(x;ν;δ)=νν2ν!2νeδ22(ν+x2)ν2Γ(ν2)(2δx1F1(n2+1;32;δ2x22(n+x2))(ν+x2)Γ(12(ν+1))+1F1(12(n+1);12;δ2x22(ν+x2))ν+x2Γ(ν2+1))