title: The osteoporosis problem.
mesh_terms: D000368:Aged; D002118:Calcium / Q000172:deficiency; D005260:Female; D050723:Fractures, Bone / Q000209:etiology; D006801:Humans; D008297:Male; D008593:Menopause; D008875:Middle Aged; D010024:Osteoporosis / Q000150:complications / Q000209:etiology; D012737:Sex Factors; D014808:Vitamin D Deficiency / Q000150:complications
chemical_list: D002118:Calcium