Tox Path Specialists, LLC (TPS) is a fully GLP compliant provider of neuropathology evaluations and consultations. Company President and Founder, Dr. Mark T. Butt, consults with numerous global pharmaceutical and pathology companies. He is co-author/co-editor of Fundamental Neuropathology for Pathologists and Toxicologists: Principles and Techniques (J. Wiley and Sons, publisher) and the principal investigator/study neuropathologist for over 500 preclinical investigations.