Hematopoietic Derived Bone Marrow Stem CellsRestricted License! Please be advised that Andrew Paul Leonard is very selective in generating a usage license for stem cell photographs. Please inquire at info@aplmicro.com. Portfolio Category Biology Stem Cells Medicine Main Library Photo Tags stemcell Hematopoietic bonemarrowstemcell immunotherapy biology bone marrow stem cell bone marrow stem cells stem cell adult stem cell adultstemcell