resources
1. Melton LJ III, Lane AW, Cooper C, Eastell R, O’Fallon WM, Riggs BL, 1993 Prevalence and incidence of vertebral fractures. Osteoporosis Int 3:113-119.
2. Ross PD, Davis JW, Epstein RS, Wasnich RD, 1991 Pre-existing fractures and bone mass predict vertebral fracture incidence in women. Ann Intern Med 114 (11):919-923

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