title: [Circadian rhythm of urinary hydroxyproline: creatinine ratio in schoolchildren].
mesh_terms: D002648:Child; D002940:Circadian Rhythm; D003404:Creatinine / Q000652:urine*; D005260:Female; D006801:Humans; D006909:Hydroxyproline / Q000652:urine*; D008297:Male
chemical_list: D003404:Creatinine; D006909:Hydroxyproline