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C08 Respiratory Tract Diseases D012140 +
C08.460 Nose Diseases D009668 +
C08.460.171 Choanal Atresia D002754
C08 Respiratory Tract Diseases D012140 +
C08.695 Respiratory System Abnormalities D015619 +
C08.695.271 Choanal Atresia D002754
C09 Otorhinolaryngologic Diseases D010038 +
C09.603 Nose Diseases D009668 +
C09.603.171 Choanal Atresia D002754
C16 Congenital, Hereditary, and Neonatal Diseases and Abnormalities D009358 +
C16.131 Abnormalities D000013 +
C16.131.740 Respiratory System Abnormalities D015619 +
C16.131.740.271 Choanal Atresia D002754