aIn vitro in vivo correlation between cumulatively administered/released hGH (open symbols) and cumulative increase in body length (closed symbols) for hGH 8.3 μg/per day (open triangles, closed triangles), microspheres of ATM1 (open squares, closed squares) and microspheres ATM2 (open circles, closed circles) and b cumulatively administered/released hGH vs cumulative increase in body length for hGH 8.3 μg/per day (closed triangles), microspheres of ATM1 (closed squares) and microspheres ATM2 (closed circles).