Conversation so far:
What illness did Eugene O'Neill have
Eugene O'Neill ultimately faced a severe Parkinsons-like tremor in his hands which made it impossible for him to write during the last 10 years of his life
When did Eugene O'Neill die?
Eugene O'Neill died on November 27, 1953, at the age of 65
When was the last time Eugene O'Neill wrote
Eugene O'Neill managed to complete Moon for the Misbegotten in 1943, just before leaving Tao House and losing his ability to write.
Who was there when Eugene O'Neill died?
Dr. Harry Kozol was present when Eugene O'Neill died

Question: Did he have any other illness
Self-contained rewrite: Did Eugene O'Neill have any other illness besides Parkinsons