DOI: 10.1055/s-00031934

The Journal of Hip Surgery

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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