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Asthma and chronic obstructive pulmonary disease COPD, Asian young man using metered dose inhaler MDI.
Adult man testing breathing function by spirometry having health problem. Diagnosis of respiratory function in pulmonary disease.
Asthma and chronic obstructive pulmonary disease COPD, Asian teenage using metered dose inhaler MDI.
CPAP mask against obstructive sleep apnea helps patients respirator mask headgear clip for nose and throat breathing medication with cpap machine against snoring and sleep disorder to breath easier
oil bubbles, obstruction, beauty in ordinary

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