DOI:
10.1055/s-00031934
The Journal of Hip Surgery
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References
Ono K.
Diagnostic criteria, staging system and roentgenographic classification of avascular necrosis of the femoral head. In: Ono K, ed. Annual Report of Japanese Investigation Committee for Intractable Disease, Avascular Necrosis of the Femoral Head.
[in Japanese] Vol. 331,
Tokyo, Japan: Ministry of Health and Welfare; 1987: 331-336
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