1. Department of Molecular Biology and Biophysics; University of Connecticut Health Center; Farmington CT 06030 USA
2. Institute of Biomedicine/Anatomy; University of Helsinki; FIN-00014 Helsinki Finland
3. Cell Biology and Metabolism Program; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health; Bethesda MD 20892 USA
4. Department of Neuroscience; University of Connecticut Health Center; Farmington CT 06030 USA