Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), Singapore. wongwc@bii-sg.org|Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), Singapore. wongwc@bii-sg.org|Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), Singapore. wongwc@bii-sg.org