Conditioning on three genome-wide significant loci, rs16957821 was identified within NTN1 at 17p13.1 (p-value = 1.40 × 10−7), which had been previously reported by CL/P and OFC (cleft lip and/or palate) GWAS and replication studies [15,16,19,22,36]. This evidence concerns the gene NTN1 and medical procedure.