Mrs R is a 68-year-old married woman who has a history of hypertension, chronic heart failure, and chronic obstructive pulmonary disease (COPD). Despite requiring 2L of oxygen/nasal cannula at home during activity, she continues to smoke two packs of cigarettes a day and has done so for 40 years

Mrs R is a 68-year-old married woman who has a history of hypertension, chronic heart failure, and chronic obstructive pulmonary diseas...

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