New VIGH Grant Supports Epilepsy Study in Africa's Sahel Region In this region, treatment gaps affect up to 96% of patients, leaving millions without care. Edwin Trevathan, MD, MPH, received a $2.8 million federal grant in collaboration with in-country investigators to launch a five-year study focused on the epidemiology and genomics of epilepsy in Africa's Sahel region. The project is funded by the National Institute of Neurological Disorders and Stroke of the NIH.