Supplementary Figures 1-7 from &lt;i&gt;p18&lt;sup&gt;Ink4c&lt;/sup&gt;&lt;/i&gt; and &lt;i&gt;p53&lt;/i&gt; Act as Tumor Suppressors in &lt;i&gt;Cyclin D1&lt;/i&gt;–Driven Primitive Neuroectodermal Tumor