In these same animals , E1A protein was detected 20 days after infection in two and 47 days after infection in one while persistent bronchiolitis was observed in four and three animals 20 and 47 days after infection , respectively .
in these same animals , e1a protein was detected 20 days after infection in two and 47 days after infection in one while persistent bronchiolitis was observed in four and three animals 20 and 47 days after infection , respectively .
O O O B-multi_cell O B-protein_molecule I-protein_molecule O O O O O O O O O O O O O O O O O B-other_name O O O O O O B-multi_cell O O O O O B-other_name O O O