1. Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
2. Bremen Center for Computational Materials Science, Universität Bremen, Am Fallturm 1, 28359 Bremen, Germany
3. University of Regensburg, 93040 Regensburg, Germany
4. Division of IT Convergence Engineering, POSTECH, Pohang 790-784, Republic of Korea