Columbia subject headings:
Bronchoscopy.
Lungs--Diseases--Diagnosis.
Lungs--Diseases--Treatment.
Lungs--Endoscopic surgery.
Thoracoscopy.
Harvard subject headings:
Bronchoscopy.
Lungs--Diseases--Diagnosis
Lungs--Diseases--Treatment.
Lungs--Endoscopic surgery.
Thoracoscopy.
Princeton subject headings: