What happens if you have too many red blood cells?

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Tags

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2. #usually
3. #attack
4. #blood
5. #thick
6. #polycythemia
7. #stroke
8. #which
9. #cells
10. #likely
11. #marrow
12. #about
13. #heart
14. #older
15. #clots
16. #makes
17. #causes