tokens: The immunosuppressants cyclosporin A ( CsA ) and FK506 have been widely used to prevent and treat graft rejection after human organ and tissue transplantations .
folded_tokens: the immunosuppressants cyclosporin a ( csa ) and fk506 have been widely used to prevent and treat graft rejection after human organ and tissue transplantations .
labels: O O B-other_organic_compound I-other_organic_compound O B-other_organic_compound O O B-other_organic_compound O O O O O O O O B-other_name I-other_name O B-body_part I-body_part O B-tissue O O