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2. Spontaneous osteonecrosis of the medial femoral condyle (abstract);Houpt;J Rheumatol,1974
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4. Spontaneous osteonecrosis of the knee;Rozing;J Bone Joint Surg [Am],1980
5. Pathology of SONK (spontaneous osteonecrosis of the knee) (abstract);Pritzker;Ann R Coll Phys Surg Can,1976