1. Bioinformatics Center, School of Electronic Engineering; Beijing University of Posts and Telecommunications; Beijing 100876 China
2. State key Laboratory of Drug Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
3. Lab of Computational Linguistics, School of Humanities and Social Sciences; Tsinghua University; Beijing 100084 China
4. School of Mechanical Electronic & Information Engineering; China University of Mining & Technology; Beijing 100083 China
5. Heilongjiang University of Chinese Medicine; Harbin 150040 China