1 Institute of Cancer Research and Translational Medicine, Department of Anatomy and Cell Biology, Medical Research Center, P.O. Box 5000, 90014, University of Oulu, Finland.
2 Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 1010062, Japan.
3 Biocenter Oulu, Light Microscopy Core Facility, P.O. Box 5000, 90014, University of Oulu, Finland.