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Stability of placenta-derived mRNA in maternal blood. Box plots of mRNA levels in maternal plasma before and after incubation of the blood sample at room temperature for 24 h. (A) hPL. (B) βhCG. (C) GAPDH. The lines inside the boxes denote the medians. The boxes mark the interval between the 25th and 75th percentiles. The whiskers denote the interval between the 10th and 90th percentiles. The filled circles mark the data points outside the 10th and 90th percentiles.
