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Differences in muscarinic receptor (MRC1-3) expression profile in AM from n = 19 COPD patients depending on culture conditions. X-axis represents comparisons always after an incubation time of 20 h: carbachol vs. control, LPS vs. control, 20 h vs. 2 h, LPS+ACh vs. LPS. Mean ± SD. * p = < 0.001 (repeated measures One Way ANOVA).
