1. College of Computer Science, Sichuan University, Chengdu, China
2. School of Computer and Information Science, Southwest University, Chongqing, China
3. College of Mobile Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing, China
4. CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
5. University of Chinese Academy of Sciences, Beijing, China