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。
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。
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。
METHODS: We conducted a multicenter, randomized, double-blind, parallel-treatment, placebo-controlled study in Japan.
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