1. Donor-derived brain tumor following neural stem cell transplantation in an ataxia telangiectasia patient;Amariglio;PLoS Medicine,2009
2. Arrow KJ 2008 http://michaelwest.org/testimony/totheHonorableBarackObama.pdf
3. Bersenev A 2012 http://celltrials.info/2012/09/17/cell-therapy-clinical-trials-fail/
4. Cell therapy trial failures in 2013;Bersenev;Stem Cell Blog,2013
5. Brennan P 2011 http://sciencedude.ocregister.com/2011/11/16/geron-corp-shuts-down-worlds-first-stem-cell-trial/159883/