Methods A random, double blind, and placebo control study was conducted.
方法采用随机双盲、安慰剂平行对照研究。
Methods The multicentre prospective, random, double-blind and imitation, positive-drug parallel control clinical trails are used.
方法采用前瞻性，随机双盲双模拟，阳性药平行对照，多中心临床研究。
Methods The multicentre prospective, random, double-blind and imitation, positive-drug parallel control clinical trails are used.
方法采用前瞻性，随机双盲双模拟，阳性药平行对照，多中心临床研究。
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