The effect of niacin, simvastatin and their combination on plasma CETP activity after 4 and 18 weeks of treatment, as well as plasma CETP mass and hepatic CETP expression after 18 weeks of treatment.

CETP, cholesteryl ester transfer protein; Simva, simvastatin. Values are means ± SD (n = 15 per group for plasma CETP activity and mass and n = 6–8 per group for hepatic CETP expression). **PCETP即胆固醇酯转运蛋白（cholesteryl ester transfer protein）；Simva即辛伐他汀（simvastatin）。数据以均值±标准差表示：血浆CETP活性及质量检测的每组样本量为15，肝脏CETP表达检测的每组样本量为6~8。**P