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Stage IV: Very Severe. Chronic obstructive pulmonary disease (COPD) is a long-term (chronic) condition. COPD is described according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) system using four stages. The goals of the GOLD system are to increase awareness of COPD and lower the morbidity (illness from a disease) and ... prediksi togel singapura 4d 3d 2d