1. Hunan Provincial Key Lab of Bioinformatics, School of Computer Science and Engineering at Central South University, Hunan, China
2. School of Computer Science and Engineering, Central South University, Changsha, Hunan, China
3. School of Computer Science and Engineering, Central South University
4. Hunan Provincial Key Lab of Bioinformatics, School of Computer Science and Engineering, Central South University, Changsha, Hunan, China
5. College of Engineering and the Department of Computer Sciences, University of Saskatchewan, Saskatoon, Canada