“…However, it is clear that all aspects of p16 Ink4a regulation cannot be explained by factors described in this study and that the p16 Ink4a gene is subject to multiple levels of control (Jacobs et al, 1999;Passegué and Wagner, 2000;Ohtani et al, 2001Ohtani et al, , 2003Gonzalez et al, 2006;Bracken et al, 2007;Kotake et al, 2007;Baker et al, 2008;Kia et al, 2008;Agger et al, 2009;Barradas et al, 2009;Tzatsos et al, 2009;Witcher and Emerson, 2009 …”