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[Neoadjuvant therapy for localized osteosarcoma of extremities. Results from the Cooperative osteosarcoma study group COSS of 925 patients].
Bielack S, Kempf-Bielack B, Schwenzer D, Birkfellner T, Delling G, Ewerbeck V, Exner GU, Fuchs N, Göbel U, Graf N, Heise U, Helmke K, von Hochstetter AR, Jürgens H, Maas R, Münchow N, Salzer-Kuntschik M, Treuner J, Veltmann U, Werner M, Winkelmann W, Zoubek A, Kotz R. Bielack S, et al. Among authors: birkfellner t. Klin Padiatr. 1999 Jul-Aug;211(4):260-70. doi: 10.1055/s-2008-1043798. Klin Padiatr. 1999. PMID: 10472560 Clinical Trial. German.
Undifferentiated embryonal sarcoma of the liver in adults.
Lenze F, Birkfellner T, Lenz P, Hussein K, Länger F, Kreipe H, Domschke W. Lenze F, et al. Among authors: birkfellner t. Cancer. 2008 May 15;112(10):2274-82. doi: 10.1002/cncr.23431. Cancer. 2008. PMID: 18361435 Free article.