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@jbouie What's wild about that? It's quite possibly a contributing factor, Vitamin D insufficiency is an established factor in COPD severity https://t.co/JRaoJoFAFz
@jbouie What's wild about that? It's quite possibly a contributing factor, Vitamin D insufficiency is an established factor in COPD severity https://t.co/JRaoJoFAFz
Meta analysis for vitamin D and COPD http://t.co/rUFzgUKPku