1. Departments of Biochemistry and Molecular Biology and Genetics, The University of Georgia, Athens, Georgia
2. Fonds National de la Recherche Scientifique, Université Libre de Bruxelles, Institut de Biologie et de Médecine Moléculaires, Charleroi-Gosselies, Belgium
3. Laboratoire de Biologie Cellulaire, Université de Liège, Liège, Belgium
4. Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania
5. Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia