它已经表明，老年人，和其他一些团体，可能有不典型临床表现的急性心肌梗塞。
It has been shown that the elderly, and certain other groups, may have atypical clinical presentations of acute MI.
它已经表明，老年人，和其他一些团体，可能有不典型临床表现的急性心肌梗塞。
It has been shown that the elderly, and certain other groups, may have atypical clinical presentations of acute MI.
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