私人利益间关系是行政法公益私益关系的始源性利益关系；法益的本质属性是法。
Legal interest (private legal interest) which balances between public interest and private interest is the base of administrative law.
目的：观察临床经验方益肺康心胶囊对慢性肺源性心脏病的治疗效果，及其对患者血清中基质金属蛋白酶- 1的影响。
Objective: to study the mechanism of YI-FEI-KANG-XIN capsule in patients with chronic pulmonary heart disease and to explore the effect of the serum level of matrix metalloproteinase-1 (MMP-1).
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