The principal test article - related microscopic findings consisted of thyroid changes ( ~ 0.06 mg / kg / day ) , depletion of lymphoid tissue ( ~ 0.2 mg / kg / day ) , thymic atrophy ( 0.6 mg / kg / day ) , decreased bone marrow hematopoiesis ( 0.6 mg / kg / day ) , and intracellular pigment deposition at various sites ( ~ 0.2 mg / kg / day ) .
The principal test article - related microscopic findings consisted of thyroid changes ( ~ 0.06 mg / kg / day ) , depletion of lymphoid tissue ( ~ 0.2 mg / kg / day ) , thymic atrophy ( 0.6 mg / kg / day ) , decreased bone marrow hematopoiesis ( 0.6 mg / kg / day ) , and intracellular pigment deposition at various sites ( ~ 0.2 mg / kg / day ) .
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