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Cell surface markers and population doublings of bMSC cultures isolated from fetal bone marrow. (A) Higher (P < 0.001) levels of mRNA of MSC surface markers (CD73, CD90, and CD105) were detected in comparison to hematopoietic surface markers (CD34 and CD45) levels. (B) PD time (days) were no significantly different among 7 consecutive culture passages. Superscripts (*) represent significant (P < 0.001) differences between MSC and hematopoietic surface markers.
