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Effect of term and preterm ECFC-CMRA or ECFC-CM50 on pulmonary artery endothelial cell (PAEC) growth after 3 days in RA. Both term ECFC-CMRA and term ECFC-CM50 increase PAEC growth. Preterm ECFC-CMRA increases PAEC growth, but preterm ECFC-CM50 and HUVEC-CMRA do not affect PAEC growth. ***P < 0.001.
