This study was designed as randomized, double-blind and crossover trials.
本研究是采取随机、双盲、交叉试验设计。
RESEARCH DESIGN and METHODS This was a double-blind, randomized, crossover trial.
研究设计与方法本研究为一项双盲、随机、交叉试验。
RESEARCH DESIGN and METHODS This was a double-blind, randomized, crossover trial.
研究设计与方法本研究为一项双盲、随机、交叉试验。
应用推荐