title: Defining osteoporosis.
authors.forename: L J
authors.initials: LJ
authors.lastname: Melton
authors.forename: H W
authors.initials: HW
authors.lastname: Wahner
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000473:pathology; D015519:Bone Density; D005260:Female; D050723:Fractures, Bone / Q000473:pathology; D006801:Humans; D008875:Middle Aged; D010024:Osteoporosis / Q000175:diagnosis / Q000473:pathology*; D012307:Risk Factors