Suppose $u\geq 0$ satisfies in $B_{1}\subset\mathbb{R}^{d}$:

$$\partial_{i}\big(a^{ij}\partial_{j}u\big)\geq fu+g.$$

Here $\frac{1}{\lambda(x)}\leq a^{ij}(x)\leq\lambda(x)$, with $\lambda(x)\in L^{p}(B_{1})$, $f,\,g\in L^{p/2}(B_{1})$ for some $p>\frac{3d}{2}$, then there exists a constant $C$, depending on $p$, $||\lambda||_{L^{p}(B_{1})}$, $||f||_{L^{p/2}(B_{1})}$, $||g||_{L^{p/2}(B_{1})}$, such that

$$\sup_{B_{\frac{1}{2}}}u\leq C(||u||_{L^{1}(B_{1})}+1).$$