POP QUIZ
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What kind of pain causes 80% of workers in the United States to lose time from work at some point in their lives?
* See answer, S6
Pop Quiz Answer: Back pain. (Question on S1)
What kind of pain causes 80% of workers in the United States to lose time from work at some point in their lives?
* See answer, S6
Pop Quiz Answer: Back pain. (Question on S1)
