1. Center for Gene Regulation, Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802
2. Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
3. Laboratory of Chromatin Biology, The Rockefeller University, New York, NY 10065
4. Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033
5. Department of Microbiology and Department of Immunology, Weill Medical College of Cornell University, New York, NY 10021