title: A laminar flow system for animal maintenance.
mesh_terms: D000818:Animals; D000830:Animals, Laboratory; D001623:Betamethasone / Q000633:toxicity; D001835:Body Weight; D004467:Economics; D005069:Evaluation Studies as Topic; D005374:Filtration; D007958:Leukocyte Count; D008722:Methods; D009504:Neutrophils; D011422:Propionates / Q000633:toxicity; D051381:Rats; D014691:Ventilation
chemical_list: D011422:Propionates; D001623:Betamethasone