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She had no work-related exposures. Her BP was 95/67 mm Hg; her heart rate was 93 beats per minute, and oxygen saturation was 98% on room air. Lung fields were clear to auscultation. She had a prominent P2 heart sound. There was no jugular venous distension or edema. There was no clubbing, rash, or synovitis. A 51-year-old woman with a history of diabetes mellitus and anemia sought treatment at the emergency room for a 2-month history of dry cough and shortness of breath and a 1-week history of substernal chest tightness. One month before her presentation, s
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