The major limitation of this draft conceptual model of SLC6A1-NDD is that it is drawn only from literature, social analytics, and two KOL interviews, and should be considered as a starting point for a more comprehensive conceptual model of SLC6A1-NDDs which should be based on a large sample of open-ended interviews of caregivers and health care providers. The gene discussed is SLC6A1; the disease is Neurodevelopmental delay.