Male Wistar rats were randomly assigned to one of 5 groups ( n=6 ) : normal control and groups were injected isoproterenol after chronic pre-treatment with 0 , 25 , 50 , or 100mg/kg of metformin twice daily for 14 days .
O O B-OrganismTaxon O O O O O O O O O O O O O O O O O O B-ChemicalEntity O O O O O O O O O O O O O B-ChemicalEntity O O O O O O