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2. Relative contributions of aging and estrogen deficiency to postmenopausal bone loss;Richelson;N Engl J Med,1984
3. Epidemiology of postmenopausal spinal and long bone fractures: A unifying approach to postmenopausal osteoporosis;Jensen;Clin Orthop,1982
4. Effect of ovariectomy on bone mass;Palummeri,1987
5. Estrogens in prevention and treatment of osteoporosis;Lindsay;Schweiz Med Wochenschr,1989