All

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 C05 Musculoskeletal Diseases D009140 +
  C05.550 Joint Diseases D007592 +
   C05.550.114 Arthritis D001168 +
    C05.550.114.606 Osteoarthritis D010003 +
     C05.550.114.606.500 Osteoarthritis, Knee D020370 
 C05 Musculoskeletal Diseases D009140 +
  C05.799 Rheumatic Diseases D012216 +
   C05.799.613 Osteoarthritis D010003 +
    C05.799.613.500 Osteoarthritis, Knee D020370