when 16 micrograms of pep was administered intratracheally in mice after exposure to the air containing 75 % o2 for 10 days , the pulmonary fibrosis was completely suppressed , while when mice were exposed to 75 % o2 after the administration of pep , the fibrosis was much severe than that of mice raised in atmospheric air .
C0034069
pulmonary fibrosis
C0030054
o2