METHODS: We conducted a multicenter, randomized, double - blind, parallel - treatment, placebo - controlled study in Japan.
方法：在日本进行一项多中心随机双盲对比治疗的安慰剂对照研究。
Efficacy and Safety of Prophylactic Large Dose of Tranexamic Acid in Spine Surgery: a Prospective, Randomized, Double-Blind, Placebo-Controlled Study.
预防性大剂量氨甲环酸在脊柱外科中的疗效和安全性：一个前瞻性，随机，双盲，安慰剂对照的研究。
The double-blind, randomized, placebo-controlled study included 24 patients ages 48 to 84.
该双盲随机严格对照试验纳入了24名48到84岁的患者。
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