title: Collagen in human myocardium as a function of age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003094:Collagen / Q000032:analysis*; D004699:Endocardium / Q000032:analysis; D006346:Heart Septum / Q000032:analysis; D006651:Histocytochemistry; D006801:Humans; D008875:Middle Aged; D009206:Myocardium / Q000032:analysis*
chemical_list: D003094:Collagen