Fig. 1From: A comparison of sample collection methods for quantifying cell-free fetal neurodevelopment transcripts in amniotic fluidPaired mean Ct values for GAPDH, NRXN3 and ZBTB18 in amniotic fluid samples stored in Streck RNA BCT at room temperature vs plain centrifuge tubes frozen at −80 °C (p < 0.0001 for all three genes)Back to article page