Sentence: This nested substudy of the AVALON trial assessed the effects of coadministered amlodipine and atorvastatin vs. either therapy alone or placebo on arterial compliance , to evaluate the vascular benefits of coadministered therapy .
Drug combination annotation:
[{'class': 'POS', 'spans': ['amlodipine', 'atorvastatin'], 'is_context_needed': True}]