PTEN loss is associated with upgrading of prostate cancer from biopsy to radical prostatectomy - Lotan, Tamara L; Carvalho, Filipe L F; Peskoe, Sarah B; Hicks, Jessica L; Good, Jennifer; Fedor, Helen L; Humphreys, Elizabeth; Han, Misop; Platz, Elizabeth A; Squire, Jeremy Andrew; Marzo, Angelo M. De; Berman, David M (Modern Pathology, 2015)