Methods Patients with steady angina pectoris were divi ded into group A(therapy group),and B (case control group) at random group C was used as normal control group.

• 方法 将冠心病稳定型心绞痛患者随机分成A、B、C三组:治疗组(A组)、病例对照组(B组) ,另设正常对照组(C组)。