SFTPA2 and newborn respiratory distress syndrome: The results of our study are not in line with the findings of the above reports; the SP-A1 6A4 and SP-A2 1A5 haplotypes were strongly related to RDS in our population (Fig 1, Tables 2 and 4, “S7 Table”), while the SP-A1 6A2 and SP-A2 1A1 haplotypes showed only a tendency towards protection (Fig 1, Table 2, “S7 Table”).