1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 335 Science Road, Daejeon 305‐701 (Republic of Korea)
2. Neurophysiology Research Group, Bionano Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Department of Functional Genomics, Korea University of Science and Technology (UST), Daejeon 305‐333 (Korea)
3. Gwangju Center, Korea Basic Science Institute (KBSI), Gwangju 500‐757 (Korea)
4. Department of Anatomy, College of Medicine, Chungnam National University, Daejeon 301‐747 (Korea)