The association of miRNA polymorphisms and oral cancer risk stratified by sex.

<p>The association of miRNA polymorphisms and oral cancer risk stratified by sex.</p

The joint effects of miRNA polymorphisms and smoking on the risk of oral cancer.

<p>The joint effects of miRNA polymorphisms and smoking on the risk of oral cancer.</p

Distribution of demographic factors and tobacco smoking in cases and controls.

<p>Distribution of demographic factors and tobacco smoking in cases and controls.</p