Linden Capital-backed Evolution Research Group, an independent clinical research site company with a focus in neuroscience and other special populations, completed the acquisition of Richmond Behavioral Associates, a behavioral health specialist. Financial terms were not disclosed. "Dr. DiBuono and Dr. Smith have built a high-quality organization that fits perfectly with ERG. RBA's thoughtful growth plan aligns with ERG's vision for the future, allowing us to further service our deep client base and continue to assist in the development of important new therapies," Michael Farah, Linden Capital Partner.