All

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 C05 Musculoskeletal Diseases D009140 +
  C05.116 Bone Diseases D001847 +
   C05.116.852 Osteonecrosis D010020 +
     C05.116.852.175 Femur Head Necrosis D005271 
 C23 Pathological Conditions, Signs and Symptoms D013568 +
  C23.550 Pathologic Processes D010335 +
   C23.550.717 Necrosis D009336 +
    C23.550.717.732 Osteonecrosis D010020 +
      C23.550.717.732.368 Femur Head Necrosis D005271