1. Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Blavatnik Institute, Boston, MA 02115, USA.
2. MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XU, UK.
3. Howard Hughes Medical Institute, Boston, MA 02115, USA.
4. Department of Chromosome Science, National Institute of Genetics, Research Organization of Information and Systems (ROIS), Mishima, Shizuoka 411-8540, Japan.
5. Biochemistry Department, Stanford School of Medicine, Stanford, CA 94305, USA.
6. Chemical and Systems Biology Department, Stanford School of Medicine, Stanford, CA 94305, USA.
7. Graduate Institute for Advanced Studies, SOKENDAI, Mishima, Shizuoka 411-8540, Japan.
8. Department of Biological Science, The University of Tokyo, Tokyo 113-0033, Japan.