CHADD’s Resident Expert and Pioneering ADHD Researcher Dies With profound gratitude for a life well-lived in service to others, and with deep sadness, CHADD remembers L. Eugene Arnold, MD, MEd, and all that he contributed to CHADD and the ADHD community. Dr. Arnold served as CHADD’s resident expert and frequently contributed to CHADD’s work. In… The post Honoring L. Eugene Arnold, MD, MEd appeared first on CHADD.