Matrix stones.
D000328:Adult; D000368:Aged; D001806:Blood Urea Nitrogen; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000175:diagnosis* / Q000601:surgery; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D014552:Urinary Tract Infections; D014567:Urography