1. Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671 Singapore
2. School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
3. Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore