a NOD/SCID β2m null mice with AMI were transplanted with ALDHloLin- or ALDHhiLin- sorted human UCB cells or PBS. Frozen sections were stained with a mouse specific CD31 antibody and visualized with DAB+ chromagen.
b Number of hearts analyzed pr. group; 10 randomly selected visual fields (40× magnification) in the tissue sub-served by the infarct related artery were analyzed from each heart.
c CD31 positive vascular structures with a well defined tubular morphology or an open lumen or structures with a linear extension equal to or larger than 50 μm were included.