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Asthma, a chronic condition of the respiratory system, is often triggered by allergens such as dust
 
Asthma, a chronic condition of the respiratory system, is often triggered by allergens such as dust mites. Dust mite, Dermatophagoides sp. SEM X105
Bronchial asthma in a section of bronchus LM X18


Bronchial asthma in a section of bronchus LM X18
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Asthma patient using his inhaler.
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