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Serum 25-hydroxy vitamin D and exercise capacity in COPD
  1. Marcello Ferrari,
  2. Kai Schenk,
  3. Christina Papadopoulou,
  4. Pietro Ferrari,
  5. Luca Dalle Carbonare,
  6. Francesco Bertoldo
  1. Department of Medicine, University of Verona, Italy (EU)
  1. Correspondence to Professor Marcello Ferrari, Department of Medicine, University of Verona, Policlinico GB Rossi, 37134 Verona, Italy;{at}

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Janssens and colleagues1 have recently reported that vitamin D deficiency is very common in patients affected by chronic obstructive pulmonary disease (COPD) and that vitamin D status correlates with lung function. In the same issue of Thorax, Quint and Wedzicha2 discuss potential effects of vitamin D deficiency and supplementation in COPD with special focus on immunomodulatory function. However, they do not consider a potential impact of the hormone on muscle mass and function, and consequently on exercise capacity in these patients.3

Since exercise …

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  • Competing interests None.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; not externally peer reviewed.