Respiratory system

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Across
  1. 2. cause: mycobacterium tuberculosis
  2. 5. beta2 adrenoceptor agonits(SABA)
  3. 7. cause: genetic, immune, system, environmental factor
  4. 8. expectorats
Down
  1. 1. persistent cough
  2. 3. antihistamine drugs
  3. 4. sore thorat,painful swallowing
  4. 6. upper respiratory tract infection