Defeats for No. 16 seed Frances Tiafoe and Reilly Opelka in the men’s draw compounded a miserable day for US players, with No. 12 seed Tommy Paul also losing on Sunday. No. 3 seed Taylor Fritz ...
A clinical trial is defined by NIH as a research study in which one or more human subjects are prospectively assigned to one or more interventions (which may include placebo or other control) to ...
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