1. Stem cell experts raise concerns about medical tourism;Barclay;The Lancet,2009
2. Black, G., 2007. Alleged U.S. stem cell fraudsters shielded by South African legal logjam. Thanks to a Stalled Extradition Case, Couple Avoids Facing 51 Charges of Allegedly Illegally Distributing Costly Stem Cell Treatments. ABC News, 23 April.
3. Hope, hype and help: ethically assessing the growing market in stem cell therapies;Caplan;The American Journal of Bioethics,2010
4. Paper chase;Cyranoski;Nature,2005