Vasectomy and risk of aggressive prostate cancer: a 24-year follow-up study.
Siddiqui MM, Wilson KM, Epstein MM, Rider JR, Martin NE, Stampfer MJ, Giovannucci EL, Mucci LA. Vasectomy and risk of aggressive prostate cancer: a 24-year follow-up study. J Clin Oncol. 2014 Sep 20; 32(27):3033-8.