A.所有糖尿病足患者
B.适用股浅动脉狭窄大于50%的患者
C.膝上大中动脉重度狭窄,则需要血管外科介入后,可以应用该术式
D.与Wagner分级有关
What does the author tell us about the experiment by Dr. Gray and Dr. Wagner?
A.Participants are arranged to step on each other's toe.
B.The study partner is actually the assistant for the researchers.
C.The participants know beforehand researchers' intention.
D.Participants have to complete exactly the same task Simultaneously.