Table 1.

Study schedule.

	Screening period	Treatment period		Follow-up
--Project Stage	Baseline	1-wk	2-wk	1-mo	2-mo	3-mo
Record fill	√
Fulfill inclusion criteria and exclusion criteria	√
Sign informed consent	√
Random allocation	√
Treatment	√	√	√
Effectiveness observation
Cardiac function	√		√			√
Blood lipid levels	√		√			√
The number of angina attacks per week	√	√	√	√	√	√
Total amount of nitroglycerin tablets	√		√			√
Safety evaluation
Blood test and urinalysis	√		√			√
Liver and kidney function	√		√			√
Record of adverse event		√	√	√	√	√