1. National Eye Institute, National Institutes of Health (NIH), Bethesda, MD 20892
2. Department of Radiology, Medical Imaging Center of the Affiliated Hospital, Weifang Medical University, Weifang City, Shandong, 261053 China
3. Ludwig Institute for Cancer Research, Uppsala University, 751 24 Uppsala, Sweden
4. NIH Biomedical Research Center, National Institute on Aging, NIH, Baltimore, MD 21224
5. Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg MB R3E 3P5, Canada
6. Department of Physiology, Kinki University School of Medicine, Osakasayama, Osaka 589-8511, Japan
7. Department of Microbiology, Tumor, and Cell Biology, Karolinska Institute, 171 77 Stockholm, Sweden