Histologic examination of the lungs and spleens after infusion of AMC EV-megakaryocytes into NSG mice. (A) Temporal representative sections of the lungs in recipient animals after the infusion of human BrdU-labeled megakaryocytes into NSG mice. Counterstained with hematoxylin. Black bar = 100 µm at an original magnification of 40×. (B) Same as in A, but stained for human CD41. (C) Same as in A, but splenic tissue is presented.