The incidence of the four different CD24 SNPs in our patient population was similar to its incidence among the healthy subjects described by our group in an earlier work [19], with the only significant exception having been found in the incidence of CD24 1626A→G: 29% of the healthy controls in that study were heterozygotes, compared to 71.2% of the PDA patients in the current work. The gene discussed is CD24; the disease is Patent ductus arteriosus.