Serotonin Exhibits Accelerated Bleomycin-Induced Pulmonary Fibrosis through TPH1 Knockout Mouse Experiments

Table 2

The fibrotic score system.

Score	Description
0	No pulmonary fibrosis
1	Mild pulmonary fibrosis, the affected area was less than 20%
2	Moderately pulmonary fibrosis, involvement of area of 20%~50%
3	Severe pulmonary fibrosis, the affected area was more than 50%, the alveolar structure disorder