Reproducibility and interobserver agreement of the R.E.N.A.L. nephrometry score: focus on imaging features - Vilaseca, Richard Mast; Westphalen, Antonio Carlos; Reis, Henrique Ferreira; Zogbi, Orlando Salomão; Silva, Gyl Eanes Barros; Reis, Rodolfo Borges dos; Muglia, Valdair Francisco (Radiologia Brasileira, 2017)