Determination of Somatic and Cancer Stem Cell Self-Renewing Symmetric Division Rate Using Sphere Assays. - Deleyrolle, Loic P.; Ericksson, Geoffery; Morrison, Brian J.; Lopez, J. Alejandro; Kevin Burrage,5; Burrage, Pamela; Vescovi, Angelo; Rietze, Rodney L.; Reynolds, Brent A. (PLoS ONE, 2011)