title: [Osteoporosis--concepts and classifications].
authors.affiliation: Department of Medicine, Kobe University School of Medicine.
authors.forename: T
authors.initials: T
authors.lastname: Fujita
mesh_terms: D002118:Calcium / Q000172:deficiency / Q000378:metabolism; D004967:Estrogens / Q000378:metabolism; D015444:Exercise; D005260:Female; D006801:Humans; D007154:Immune System Diseases / Q000150:complications; D009747:Nutritional Physiological Phenomena; D010024:Osteoporosis / Q000145:classification* / Q000209:etiology / Q000378:metabolism; D012737:Sex Factors; D014807:Vitamin D / Q000378:metabolism
chemical_list: D004967:Estrogens; D014807:Vitamin D; D002118:Calcium