title: Closing volume.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003936:Diagnosis, Computer-Assisted; D005260:Female; D006371:Helium; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D012129:Respiratory Function Tests; D013147:Spirometry
chemical_list: D006371:Helium