Mononuclear leukocytes were isolated from peripheral blood before the cold exposure and drug regimen began , and then after every 20 exposures .
mononuclear leukocytes were isolated from peripheral blood before the cold exposure and drug regimen began , and then after every 20 exposures .
B-cell_type I-cell_type O O O B-tissue I-tissue O O O O O O O O O O O O O O O O