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Duration of spontaneous coughing (median no of days). Overall treatment P = 0.0003. *vs. T01, P < 0.10. †vs. T02, P < 0.10. T01, PBS control. T02, Bronchicine CAe. T03, B. bronchiseptica Bacterial Ghosts (1 x 10∧7 cells/mL). T04, B. bronchiseptica Bacterial Ghosts (1 × 10∧5 cells/mL).
