1. State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
2. Computational Biology Center, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, United States
3. Department of Chemistry, Columbia University, New York, New York 10027, United States