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Severe Vitamin D Deficiency: A Prerequisite for COPD Responsiveness to Vitamin D Supplementation?

Diane R. Gold, MD, MPH; JoAnn E. Manson, MD, DrPH

Annals of Internal Medicine 2012;156:156-157. doi:10.7326/0003-4819-156-2-201201170-00013

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Annals of Internal Medicine

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