1. School of Engineering and Information Technology; The University of New South Wales; Canberra ACT 2600 Australia
2. CSIRO Computational Informatics; Locked Bag 17 North Ryde NSW 2113 Australia
3. Bioinformatics Institute; 30 Biopolis Street, #07-01 Matrix 138671 Singapore
4. Aizu Research Cluster for Medical Engineering and Informatics, Research Center for Advanced Information Science and Technology; The University of Aizu; Fukushima Japan