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R03 - DRUGS FOR OBSTRUCTIVE AIRWAY DISEASES
Hierarchy:
R - RESPIRATORY SYSTEM
Level 3 Subgroups (4)
R03A - ADRENERGICS, INHALANTS
R03B - OTHER DRUGS FOR OBSTRUCTIVE AIRWAY DISEASES, INHALANTS
R03C - ADRENERGICS FOR SYSTEMIC USE
R03D - OTHER SYSTEMIC DRUGS FOR OBSTRUCTIVE AIRWAY DISEASES