NEJM Volume 363:e1 July 1, 2010 Number 1
A 10-year-old previously healthy girl presented with episodic wheezing, dyspnea, and progressive exercise intolerance, which had developed during the preceding 9 months.
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NEJM Volume 363:e1 July 1, 2010 Number 1
A 10-year-old previously healthy girl presented with episodic wheezing, dyspnea, and progressive exercise intolerance, which had developed during the preceding 9 months.