A Dearth of Receptors (IMAGE) Boston Children's Hospital Caption Infants who died from SIDS had significantly fewer 5-HT1A receptors than controls, as shown in this brainstem tissue section. The red color indicates the greatest density of receptors. Credit Image courtesy David Paterson, Ph.D., Children’s Hospital Boston. Usage Restrictions Please credit as indicated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.