title: Hydroxyproline excretion and collagen catabolism in rats of different age groups.
mesh_terms: D000375:Aging; D000818:Animals; D003094:Collagen / Q000378:metabolism*; D006909:Hydroxyproline / Q000652:urine*; D008297:Male; D051381:Rats; D013997:Time Factors
chemical_list: D003094:Collagen; D006909:Hydroxyproline