Thymic atrophy was observed in all treatment groups including the controls and is a well - known stress - associated physiological response that may occur in treated animals as a secondary change .
Thymic atrophy was observed in all treatment groups including the controls and is a well - known stress - associated physiological response that may occur in treated animals as a secondary change .
B-FINDING I-FINDING O O O O B-GROUP I-GROUP O O O O O O O O O O O O O O O O O O O O O O O O O