Preston MA, Feldman AS, Coen JJ, McDougal WS, Smith MR, Paly JJ, Carrasquillo R, Wu CL, Dahl DM, Barrisford GW, Blute ML, Zietman AI. Active surveillance for low-risk prostate cancer: Need for intervention and survival at 10 years. Urol Oncol. 2015 Sep; 33(9):383.e9-16.