title: Platelet aggregation by human collagen in relation to its age.
mesh_terms: D000005:Abdomen; D000328:Adult; D000368:Aged; D000375:Aging; D001013:Aorta, Thoracic; D001792:Blood Platelets; D003094:Collagen / Q000032:analysis / Q000378:metabolism*; D046508:Culture Techniques; D006801:Humans; D006909:Hydroxyproline / Q000032:analysis / Q000378:metabolism*; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D012867:Skin
chemical_list: D003094:Collagen; D006909:Hydroxyproline