1. Department of Pharmacology, University at Stony Brook, Stony Brook, New York 11794-8651
2. Program in Molecular and Cellular Biology, University at Stony Brook, Stony Brook, New York 11794-8651
3. Program in Genetics, Institute for Cell and Developmental Biology, University at Stony Brook, Stony Brook, New York 11794-8651
4. Department of Biochemistry and Cell Biology, University at Stony Brook, Stony Brook, New York 11794-8651