1. Department of NeurobiologyHoward Hughes Medical InstituteDuke University Medical CenterDurham North Carolina27710
2. Computational Biology and Bioinformatics ProgramInstitute for Genome Science and PolicyDuke UniversityDurham North Carolina27710
3. Beijing Prosperous BiopharmBeijing100085 China
4. Research ServiceVeterans Affairs Medical Center Durham North Carolina27710
5. Department of BiologyMcGill UniversityMontreal QuebecH3A 1B1 Canada