1. The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
2. Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
3. Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
4. Department of Biology, North Carolina Central University, Durham, 1801 Fayetteville St., North Carolina 27707, USA