CXCL8 and attention deficit-hyperactivity disorder: One of these, MYT1L (cpg site: cg25376660), is expressed in neuronal tissue and has been linked to multiple neurodevelopmental and psychiatric outcomes (intellectual disabilities, autism spectrum disorder, schizophrenia, and attention deficit hyperactivity disorder (Mansfield et al., 2020 Jun; Chen et al., 2022 Jul 22) as well as spontaneous preterm birth, IL-8 levels, type 2 diabetes, and systolic blood pressure (Sollis et al., 2023 Jan 6).