tokens: A wide spectrum of levels of HIV-1 expression have been demonstrated in various cells , both in cell culture and in vivo .
folded_tokens: a wide spectrum of levels of hiv-1 expression have been demonstrated in various cells , both in cell culture and in vivo .
labels: O O O O O O B-virus O O O O O O O O O O B-other_name I-other_name O B-other_name I-other_name O