Sentence: The effects of combination therapy with chenodeoxycholic acid ( CDCA ) and simvastatin on serum cholestanol , low-density lipoprotein ( LDL ) cholesterol , and lathosterol levels were investigated in seven adult patients with cerebrotendinous xanthomatosis ( CTX ) who were on long-term treatment with CDCA .
Drug combination annotation:
[{'class': 'POS', 'spans': ['chenodeoxycholic', 'simvastatin'], 'is_context_needed': True}]