Kuzmanić Samija et al. analyzed NOS3 SNVs rs3918186, rs3918188, rs1800783, rs1808593, rs3918227, rs1799983, and rs1800779 in the Croatian population consisting of 110 preterm children with HIE and 128 preterm children without HIE at the age of 2 years and older. Here, NOS3 is linked to perinatal asphyxia.