Warrick JI, Tsodikov A, Kunju LP, Chinnaiyan AM, Palapattu GS, Morgan TM, Alva A, Tomlins S, Wu A, Montgomery JS, Hafez KS, Wolf JS, Weizer AZ, Mehra R. Papillary renal cell carcinoma revisited: a comprehensive histomorphologic study with outcome correlations. Hum Pathol. 2014 Jun; 45(6):1139-46.