SFTPA1 and newborn respiratory distress syndrome: In a Finnish population of infants born at <32 weeks of gestation, the SP-A1 6A2 and SP-A2 1A0 haplotypes have been shown to predispose to RDS, while the SP-A1 6A3, SP-A2 1A1 and SP-A2 1A2 haplotypes were protective in homozygous status [13].