For most people in a study of COPD patients, vaping cannabis had no clinically significant effect — either negative or positive — on their symptoms of breathlessness during exercise or on their exercise performance.
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It is never too late to start
For most people in a study of COPD patients, vaping cannabis had no clinically significant effect — either negative or positive — on their symptoms of breathlessness during exercise or on their exercise performance.
…
For most people in a study of COPD patients, vaping cannabis had no clinically significant effect — either negative or positive — on their symptoms of breathlessness during exercise or on their exercise performance.
…