1. Graduate Program in Genetics, Bioinformatics and Computational Biology, Virginia Tech, Blacksburg, VA, USA
2. School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
3. Department of Computer Science, Virginia Tech, Blacksburg, VA, USA
4. Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, USA
5. Department of Plant Pathology, University of California Davis, Davis, CA, USA