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CXCR4 expression in NPCs verified by flow cytometry. a Gating for positive or non-fluorescence was done on unstained NPCs. The levels of the fluorescence were minimal. b The majority of the NPCs stained with the CXCR4 antibody and 7AAD fell within Q4 (CXCR4+/7AAD−). c More than 95 % of the NPCs were viable and CXCR4 positive. The values are expressed as mean ± standard deviation
