R R - Respiratory System
ATC Level 1: Respiratory System
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Related Classes
A
A - Alimentary Tract and Metabolism
B
B - Blood and Blood Forming Organs
C
C - Cardiovascular System
D
D - Dermatologicals
G
G - Genito-Urinary System and Sex Hormones
H
H - Systemic Hormonal Preparations, Excluding Sex Hormones and Insulins
J
J - Antiinfectives for Systemic Use
L
L - Antineoplastic and Immunomodulating Agents