It is just additional information to be used in conjunction with what you already know from the patient history, physical examination, other tests that have been conducted, imaging and so on.

它只是一种额外信息，而且要和患者的病史，体检，其他检查，影像学等所提供的信息相结合。

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By contrast, covering for another physician almost invariably means inefficiency additional time to learn the patients' relevant history, and often either a direct patient encounter or an outpatient facility visit, all of which greatly add to the cost.

WSJ: Ed Marsh: Reflections of a Medical Ex-Practitioner