PubMed · 2018 · 11 citations · 26 references
The delay of the initial diagnosis is significantly related to the severity of COPD.
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Joan B. Soriano, Amanuel Alemu Abajobir, Kalkidan Hassen Abate et al. · The Lancet Respiratory Medicine · 2017 · 2.5K citations · Full text
An official European Respiratory Society statement on physical activity in COPD
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