Though few comprehensive studies have been conducted, one by the University of Washington investigated how drug sample availability affected what physicians prescribe.
尽管人们几乎没有进行过全面的研究，但是华盛顿大学的一项研究调查了药品样本的可获得性对医生开的处方的影响。
Though few comprehensive studies have been conducted, one by the University of Washington investigated how drug sample availability affected what physicians prescribe.
尽管人们几乎没有进行过全面的研究，但是华盛顿大学的一项研究调查了药品样本的可获得性对医生开的处方的影响。
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