Forest plot of HNC risk associated with XRCC1 Arg399Gln gene polymorphism under all genetic models in total population. LouYin PengWen-jia CaoDong-sheng XieJuan LiHong-hong JiangZheng-xuan 2013 <p>Forest plot of HNC risk associated with XRCC1 Arg399Gln gene polymorphism under all genetic models in total population.</p>