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The total number of cardiomyocytes in the (A) left ventricle plus septum and (B) right ventricle of lambs born at term (150 days’ gestation; black) or preterm (128 days’ gestation; white) at 2- and 5-month term-equivalent age. Analysis by 2-way analysis of variance, with the factors preterm birth (P), postnatal age (A), and their interaction (P∗A). Data are shown as mean ± standard error of the mean. n = 8-10/group.
