Slc12a2-Related Autosomal Recessive Neonatal-Developmental Delay-Intellectual Disability-Feeding Difficulty-Sensorineural Deafness Syndrome An important gene associated with Slc12a2-Related Autosomal Recessive Neonatal-Developmental Delay-Intellectual Disability-Feeding Difficulty-Sensorineural Deafness Syndrome is SLC12A2 (Solute Carrier Family 12 Member 2).