1. The Broad Institute, 7 Cambridge Center,
Cambridge, Massachusetts 02142, United States
2. Department of Molecular Biology
and Center for Computational and Integrative Biology, Massachusetts General Hospital, 185 Cambridge St.,
Boston, Massachusetts 02114, United States
3. Department of Microbiology and
Immunobiology, Harvard Medical School,
200 Longwood Ave, Boston, Massachusetts 02115, United States
4. Chinese Academy of Sciences, Institute of Microbiology, 8 Zhong Guan Cun Bei Er
Tiao, Haidian District, Beijing, 100080, People’s Republic
of China