Arthritis Crossword

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Across
  1. 4. Where does arthritis normally affect?
  2. 6. Its not curable but there are ... to help symptoms.
  3. 7. What is one main cause of arthritis?
Down
  1. 1. This disease is not curable there for it is...
  2. 2. What is the disease's name?
  3. 3. What age group is normally affected?
  4. 5. What system does it affect?