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3.Koestner A,Swenherg JA, Wechsler W. Transplacental production with ethylnitrosourea of neoplasms of the nervous system in Sprague-Dawley rats. Am J Pathol. 1971,63 (1):37-56

4.Rabolli GF, Raine WA. Brain Tumours induced in Hamsters inoculated inlracerebrally at Birth Rous Sarcoma Virus. Nature, 1964,204:898-899

5.Walsh JW,Zimmer SG,Perdue ML. Role of viruses inɽe induction of primary intracranial tumors. Neurosurge.ry, 1982, 10(5):643-662

6.Weggen S, Bayer TA, von Dei:mling A,el al. Low frequency of SV40,JC and BK polyomavirus sequences in human medulloblastomas, meningiomas and ependymomas. Brain Pathol., 2000, 10 (1):85-92

7.Wilfong RF,Bigner DD,Self DJ,et al. Brain tumor types induced by the Schmidt-Ruppin strain of Rous sarcoma virus in inbred fischer rals. Acta NeuropaСol,1973,25 (3):196-206

8.Yoshida J, Cravioto H. Nitrosourea-induced brain tumors: an in vivo and in vitro tumor model system. J Natl Cancer Inst, 1978,61 (2):365-374

9.Zeller WJ,Ivankovic S,Habs M,et al. Experimental hemicaJ production of brain tumors. Ann N Y Acad Sci,1982, 381: 250-263

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5.Walsh JW,Zimmer SG,Perdue ML. Role of viruses inɽe induction of primary intracranial tumors. Neurosurge.ry, 1982, 10(5):643-662

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7.Wilfong RF,Bigner DD,Self DJ,et al. Brain tumor types induced by the Schmidt-Ruppin strain of Rous sarcoma virus in inbred fischer rals. Acta NeuropaСol,1973,25 (3):196-206

8.Yoshida J, Cravioto H. Nitrosourea-induced brain tumors: an in vivo and in vitro tumor model system. J Natl Cancer Inst, 1978,61 (2):365-374

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