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. 2015 Nov 6;5:16349. doi: 10.1038/srep16349

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Cells were incubated with or without NGF (50 ng/ml), extracts or crude polysaccharides (25 to 100 μg/ml) for 48 h. Cells in complete F-12 K medium served as a negative control. Cells treated with 50 ng/ml of NGF served as a positive control. Data were expressed as means ± standard deviation (n = 3). Means with different alphabets show significant difference (p < 0.05).