Chen, Jun Treatment Outcomes and Prognostic Factors of Patients With Primary Spinal Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumors. [electronic resource] - Frontiers in oncology 2019 - 555 p. digital Publication Type: Journal Article ISSN: 2234-943X Standard No.: 10.3389/fonc.2019.00555 doi