The 9-cis RA was generally more effective than all-trans RA in inhibiting HIV production and in combination generally more effective than the single agents alone .
the 9-cis ra was generally more effective than all-trans ra in inhibiting hiv production and in combination generally more effective than the single agents alone .
O B-other_organic_compound I-other_organic_compound O O O O O B-other_organic_compound I-other_organic_compound O O B-virus O O O O O O O O O O O O O