title: Changes in collagen with age--VI. Age and smoking related changes in human lung connective tissue.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D000596:Amino Acids / Q000378:metabolism; D003094:Collagen / Q000378:metabolism*; D005260:Female; D006146:Guanidines / Q000378:metabolism; D006801:Humans; D007525:Isoelectric Focusing; D008168:Lung / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D012907:Smoking; D012995:Solubility
chemical_list: D000596:Amino Acids; D006146:Guanidines; D003094:Collagen