Table 2.

Content of collagen in the lung tissues (mg/g).

Groups	Control	Model	Treatment
Week 1	94.61 ± 6.52	101.71 ± 8.09	98.73 ± 9.95
Week 2	93.65 ± 5.57	114.83 ± 5.47	102.52 ± 4.26
Week 4	94.72 ± 5.31	167.32 ± 6.44*	96.34 ± 11.17#

*P < 0.05, compared with the control group.

^# P < 0.01, compared with the model group.