在2007年发表在《普通内科医学杂志》上的一项研究中，研究人员询问了数百名医生一个50岁男性患者出现胸痛的假设情况。

In one study published in the Journal of General Internal Medicine in 2007, researchers asked several hundred doctors about a hypothetical 50-year-old male patient who showed up with chest pain.

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那是根据《普通内科医学》期刊的一项研究。

That's according to a study in the Journal of General Internal Medicine.

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更让人惊奇的是，它是由虱子叮咬引起的。那是根据《普通内科医学》期刊的一项研究。

Even weirder is what might be causing it-tick bites, according to a study in the Journal of General Internal Medicine.

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