Bone marrow

http://www.scribd.com/doc/36497740/Bone-Marrow-Macrophages-Maintain-Hematopoietic-Stem-Cell-HSC-Niches-and-Their-Depletion-Mobilizes-HSC

Bone Marrow Macrophages Maintain Hematopoietic Stem Cell (HSC) Niches and Their Depletion Mobilizes

Breakthrough Method of Stem Cell Expansion

http://www.newswise.com/articles/breakthrough-method-of-stem-cell-expansion