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(A,B) Disposable rotating-wall vessel culture, four station rotator base, Synthecon®, Houston, TX, USA; (C) Cellular spheroids of glioblastoma cells produced after 6 days by using rotating-wall vessel; (D) Tint of a blade of cellular spheroids of glioblastoma cells by the hematoxyline-eosine after 4 weeks culture (Radiobiology Laboratory, EA 3430, Strasbourg, France).
