Calliope Holingue is researching the microbiome among kids with autism. She's part of a growing field of research seeking to understand the gut-brain axis.Kennedy Krieger Institutehttps://www.npr.org/sections/health-shots/2023/07/08/1186092825/studying-the-link-between-the-gut-and-mental-health-is-personal-for-this-scienti