**Markers for Hematopoietic Stem Cells: Histories and Recent Achievements**

Takafumi Yokota1, Kenji Oritani1, Stefan Butz2, Stephan Ewers2, Dietmar Vestweber2 and Yuzuru Kanakura1 *1Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita 2Department of Vascular Cell Biology, Max-Planck-Institute for Molecular Biomedicine, Münster, 1Japan 2Germany* 
