1. IBM Research-Almaden, 650 Harry Road, San Jose, California 95120 United States
2. Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
3. Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
4. Genome Institute of Singapore, 60 Biopolis Street, Genome, Singapore 138672, Singapore