1. Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
2. Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
3. Microscopy and Cell Analysis Core, Mayo Clinic, Rochester, MN 55905, USA
4. Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN 55455, USA
5. University Imaging Centers, University of Minnesota, Minneapolis, MN 55455, USA
6. MD Anderson Cancer Center, The University of Texas, Houston, TX 77030, USA