VHL and HIF-1α: gene variations and prognosis in early-stage clear cell renal cell carcinoma. - Lessi F; Mazzanti CM; Tomei S; Di Cristofano C; Minervini A; Menicagli M; Apollo A; Masieri L; Collecchi P; Minervini R; Carini M; Bevilacqua G (Medical oncology (Northwood, London, England), 2014)