患者男,26岁。1周来发热,伴肌肉痛及胸痛,查体可闻及心包摩擦音,心电图:Ⅱ、Ⅲ、aVF、aVL、V2~V6导联ST段抬高。其最常见病原体为()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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