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Immunohistochemistry for drug-resistant genes and CD133 (200×). The immunohistochemistry (IHC) results of Topo II: (−), (+), (++), (+++); the IHC results of P-gp: (−), (+), (++), (+++); the IHC results of LRP : (−), (+), (++), (+++); the IHC results of GST-π:(−), (+), (++), (+++); and the IHC results of CD133: (−), (+), (++), (+++).
