Case A 36-year-old man presents to an urgent care center with a dry cough that he has had for the preceding 10 days. He has mild dyspnea. He has no rhinorrhea, fever, chest pain, blood in the urine or stool, or lower-extremity pain or swelling. He has no history of previous illnesses. He smokes cigarettes, occasionally drinks alcohol, and has a remote history of intravenous drug use. View the image taken (Figure 1) and consider …
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