title: Evidence for two distinct syndromes of involutional osteoporosis.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D003100:Colles' Fracture / Q000453:epidemiology; D005260:Female; D006620:Hip Fractures / Q000453:epidemiology; D006801:Humans; D008297:Male; D008593:Menopause; D008875:Middle Aged; D010024:Osteoporosis / Q000145:classification* / Q000453:epidemiology; D012737:Sex Factors; D013577:Syndrome; D014481:United States