MDM4 and laryngotracheoesophageal cleft: In our study we investigated the TP53 Arg72Pro (rs1042522), MDM2 T309G (rs2279744), MDM4 (rs4245739), MTHFR (rs1801133), CASP8 (rs3834129), and CCR5 (rs333) polymorphisms in 92 Lithuanian LC patients.