1. Department of Biology, Texas A&M University, College Station, Texas 77843-3258
2. Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon 97331-7305
3. Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215
4. The Eli and Edy L. Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142
5. Department of Genetics, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire 03755-3844
6. Bioinformatics Program, Boston University, Boston, Massachusetts 02215
7. Department of Ecology and Evolutionary Biology, Yale University, New Haven
8. Department of Biostatistics, Yale School of Public Health, New Haven, Connecticut 06520
9. Department of Microbiology, Boston University, Boston, Massachusetts 02215