TY - GEN AU - Wu,Gang-Feng AU - Zhang,Xiao-Long AU - Luo,Zhen-Gang AU - Yan,Jia-Jun AU - Pan,Shou-Hua AU - Ying,Xiang-Rong AU - Pan,Jian-Gang AU - Zhang,Guan-Fu TI - Metformin therapy and prostate cancer risk: a meta-analysis of observational studies SN - 1940-5901 PY - 2015///1109 N1 - Publication Type: Journal Article ER -