Analysis of Efficacy and Toxicity Profile of First-Line Sunitinib or Pazopanib in Metastatic Clear Cell Renal Cell Carcinoma in the Brazilian Population oleh Pedro Isaacsson Velho, Mirella Nardo, Manoel Carlos Leonardi de Azevedo Souza, Renata R.C. Colombo Bonadio, Guilherme Nader Marta, David Q.B. Muniz, Diogo Assed Bastos, Carlos Dzik