Tandstad, Torgrim, et al. “Bilateral Testicular Germ Cell Tumors in Patients Treated for Clinical Stage I Non-Seminoma Within Two Risk-Adapted SWENOTECA Protocols”. Acta Oncologica, vol. 54, no. 4, Apr. 2015, pp. 493-9, doi:10.3109/0284186X.2014.953256.