1. Weiss RA NATURE 410:

2. Reference Centers for Disease Control

3. Reference Centers for Disease Control

4. Reference Centers for Disease Control

5. Reference Centers for Disease Control

6. Reference Centers for Disease Control

7. Weiss RA NATURE 410:

8. Reference Centers for Disease Control

9. Reference Centers for Disease Control

10. Reference Centers for Disease Control

11. Reference Centers for Disease Control

12. Reference Centers for Disease Control

13. Weiss RA NATURE 410:

14. Reference Centers for Disease Control

15. Reference Centers for Disease Control

16. Reference Centers for Disease Control

17. Reference Centers for Disease Control

18. Reference Centers for Disease Control

21. Reference Centers for Disease Control

22. Reference Centers for Disease Control

23. Reference Centers for Disease Control

24. Reference Centers for Disease Control

25. Reference Centers for Disease Control

26. Reference Centers for Disease Control

27. Reference Centers for Disease Control

28. Reference Centers for Disease Control

29. Reference Centers for Disease Control

30. Reference Centers for Disease Control

31. Weiss RA NATURE 410:

32. Reference Centers for Disease Control

33. Reference Centers for Disease Control

34. Reference Centers for Disease Control

35. Reference Centers for Disease Control

36. Reference Centers for Disease Control

37. Weiss RA NATURE 410:

38. Reference Centers for Disease Control

39. Reference Centers for Disease Control

40. Reference Centers for Disease Control

41. Reference Centers for Disease Control

42. Reference Centers for Disease Control

43. Weiss RA NATURE 410:

44. Reference Centers for Disease Control

45. Reference Centers for Disease Control

46. Reference Centers for Disease Control

47. Reference Centers for Disease Control

48. Reference Centers for Disease Control