Although surfactant di-saturated phosphatidylcholine (DSPC) synthesis and surfactant-A were not different in tracheal aspirates taken from infants with or without CDH28, a subsequent study from the same group found reduced SP-B fractional synthesis rate and amount present in tracheal aspirates from infants with CDH compared to infants without lung disease29. Here, SFTPB is linked to congenital diaphragmatic hernia.