Sentence: Recipients received the dual endothelin-1 ( ET-1 ) receptor blocker , bosentan ( 100 mg/kg ) , the angiotensin-converting enzyme ( ACE ) inhibitor , ramipril ( 5 mg/kg ) , bosentan plus ramipril ( doses as just noted ) or vehicle .
Drug combination annotation:
[{'class': 'POS', 'spans': ['bosentan', 'ramipril'], 'is_context_needed': True}]