1. Alpers A, Lo B (1995) Commodification and commercialization in human embryo research. Stanf Law Policy Rev 6:39–46
2. Amit M, Carpenter MK, Inokuma MS, Chiu CP, Harris CP, Waknitz MA, Itskovitz-Eldor J, Thomson JA (2000) Clonally derived human embryonic stem cell lines maintain pluripotency and proliferative potential for prolonged periods of culture. Dev Biol 227:271–278
3. Ashton BA, Allen TD, Howlett CR, Eaglesom CC, Hattori A, Owen M (1980) Formation of bone and cartilage by marrow stromal cells in diffusion chambers in vivo. Clin Orthop Relat Res 151:294–307
4. Atkin NB, Baker MC, Robinson R, Gaze SE (1974) Chomosome studies on 14 near-diploid carcinomas of the ovary. Eur J Cancer 10:144–146
5. Bab I, Ashton BA, Gazit D, Marx G, Williamson MC, Owen ME (1986) Kinetics and differentiation of marrow stromal cells in diffusion chambers in vivo. J Cell Sci 84:139–151