21. [NIH- Unidentified Laboratory Photos] Subject(s): LaboratoriesNational Institutes of Health (U.S.)
22. [NIH- Unidentified Laboratory Photos] Subject(s): LaboratoriesNational Institutes of Health (U.S.)
23. [NIH- Unidentified Laboratory Photos] Subject(s): LaboratoriesNational Institutes of Health (U.S.)
24. [NIH- Unidentified Laboratory Photos] Subject(s): LaboratoriesNational Institutes of Health (U.S.)
27. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
28. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
29. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
30. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
31. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
32. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
33. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonNational Institutes of Health (U.S.)
34. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
35. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
36. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
37. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)
38. Open-heart surgery, NIH, 1955. Photo by R. Perry Subject(s): Thoracic SurgerySurgeonsNational Institutes of Health (U.S.)