Human Spermatogonial Stem Cells and Pluripotent Stem Cells from Adult Human Testes Kobayashi, Hideyuki and Nakajima, Koichi and Kamimura, Shuichi and Nagao, Koichi and Ishii, Nobuhisa, Journal of Mammalian Ova Research, 27, 204-207 (2010), DOI:http://dx.doi.org/10.1274/jmor.27.204