1. Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan;
2. Cell Engineering Division, RIKEN BioResource Research Center, Ibaraki, Japan;
3. Transborder Medical Research Center (TMRC),
4. Department of Anatomy and Embryology, Faculty of Medicine,
5. International Institute for Integrative Sleep Medicine (WPI-IIIS), and
6. Life Science Center, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan; and
7. Department of Hematology, Nishiwaki Municipal Hospital, Nishiwaki, Japan