IL6 and neoplasm: Association of &lt;i&gt;IL6&lt;/i&gt; rs1800795, &lt;i&gt;TNF&lt;/i&gt; rs1800629, &lt;i&gt;CCL2&lt;/i&gt; rs1024611 and &lt;i&gt;VEGFA&lt;/i&gt; rs699947 Polymorphisms with Bladder Cancer Risk, Tumor Aggressiveness, and HRV Parameters of Autonomic Nervous System Regulation.