Dye efflux studies suggest that hematopoietic stem cells expressing low or undetectable levels of CD34 antigen exist in multiple species
Margaret A. Goodell Michael Rosenzweig Hyung Kim Douglas F. Marks MaryAnn DeMaria Glenn Paradis Stephen A. Grupp Colin A. Sieff Richard C. Mulligan & R. Paul Johnson Nature Medicine3, 1337 - 1345 (1997).
