1. Gene Regulation Section, Laboratory of Pathology, National Cancer Institute; Bethesda MD USA
2. Division of Therapeutic Proteins, Laboratory of Chemistry, Center for Drug Evaluation and Research, Food and Drug Administration; Bethesda MD USA
3. Light Microscopy Core Facility, Cell Biology and Physiology Center, National Heart, Lung and Blood Institute; Bethesda MD USA
4. Department of Tumor Cell Biology, Flow Cytometry Shared Facility, St Jude Children's Research Hospital; Memphis TN USA
5. Department of Cell Biology and Anatomy, Rosalind Franklin University of Medicine and Science; North Chicago IL USA