title: The use of the hydroxyproline--creatinine ratio in elderly patients.
mesh_terms: D000368:Aged; D000375:Aging; D001824:Body Constitution; D002940:Circadian Rhythm; D003094:Collagen / Q000378:metabolism; D003404:Creatinine / Q000652:urine*; D005260:Female; D006801:Humans; D006909:Hydroxyproline / Q000652:urine*; D008297:Male; D008722:Methods; D008875:Middle Aged
chemical_list: D003094:Collagen; D003404:Creatinine; D006909:Hydroxyproline