(CNN)Michael J. Fox is reportedly retiring again because of health concerns.The actor, who was diagnosed decades ago with Parkinson's disease, shares his thoughts on the subject in his new book "No Time Like the Future," People magazine reports.Fox has had more recent health issues, including a 2018 surgery to remove a noncancerous tumor from his spine.He writes that "The nascent diminishment in my ability to download words and repeat them verbatim is just the latest ripple in the pond.""There is a time for everything, and my time of putting in a twelve-hour workday, and memorizing seven pages of dialogue, is best behind me," he reportedly writes in his book.
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