1. Computational Biology
Center, IBM Thomas J. Watson Research Center, Yorktown Heights,
New York 10598, United States
2. Shanghai Institute of Applied
Physics, Chinese Academy of Sciences, Shanghai
201800, China
3. State Key Laboratory
of Surface
Physics, Key Laboratory for Computational Physical Sciences (Ministry
of Education), and Department of Physics, Fudan University, 220 Handan Road, Shanghai, 200433, China
4. Department of Chemistry, Columbia University, New York, New York 10027, United
States