Hansen, James E Mitochondrial disorders and exertional intolerance: controversy continues. [electronic resource] - American journal of respiratory and critical care medicine Jul 2002 - 118; author reply 119-20 p. digital Publication Type: Letter ISSN: 1073-449X Standard No.: 10.1164/ajrccm.166.1.16611 doi Subjects--Topical Terms: Exercise ToleranceHumansMitochondrial Myopathies--diagnosis