In this same analysis of SIDS subsets with and without low medullary 5-HT1A and clusters of immature cells in the subgranular layer (Table 8), we showed a significant difference in sleep site with a higher proportion of cases with neither hippocampal or medullary abnormalities sleeping in sites other than the crib (e.g., adult bed). The gene discussed is HTR1A; the disease is sudden infant death syndrome.