title: Reply to M.M.J. Zanders et al.
authors.affiliation: Brigham and Women's Hospital; Harvard School of Public Health, Boston, MA.
authors.forename: Kathryn L
authors.initials: KL
authors.lastname: Penney
authors.forename: Meir J
authors.initials: MJ
authors.lastname: Stampfer
mesh_terms: D003920:Diabetes Mellitus / Q000188:drug therapy*; D006801:Humans; D007004:Hypoglycemic Agents / Q000627:therapeutic use*; D008297:Male; D008687:Metformin / Q000627:therapeutic use*; D011471:Prostatic Neoplasms / Q000401:mortality*
chemical_list: D007004:Hypoglycemic Agents; D008687:Metformin