A recent article and an earlier review, co-authored by members of the same research group, are currently available from the Journal of Cellular and Molecular Medicine. They are:
1) High aldehyde dehydrogenase and expression of cancer stem cell markers selects for breast cancer cells with enhanced malignant and metastatic ability, by Alysha K Croker and 6 co-authors, including Alison L Allan, J Cell Mol Med 2008(Aug 4). [Epub ahead of print] [PubMed Abstract]. Currently, a PDF version of the full text is gratis OA.
2) Cancer stem cells: implications for the progression and treatment of metastatic disease, a review by Alysha K Croker and Alison L Allan, J Cell Mol Med 2008(Apr); 12(2): 374-90 [PubMed Abstract]. Currently, both the HTML and PDF versions of the full text are gratis OA.
For more about these two articles, and the journal in which they both were published, see: Breast cancer stem cells hard to kill? Cancer Stem Cell News, October 19, 2008.
It’s not clear, either from the articles themselves, or from the PubMed citations, that these articles were intended to be OA.