1 From the Vanderbilt Institute for Global Health (J.P.-G., E.T.) and Departments of Pediatrics and Neurology (E.T.), Vanderbilt University Medical Center, Nashville, TN.
2 From the Vanderbilt Institute for Global Health (J.P.-G., E.T.) and Departments of Pediatrics and Neurology (E.T.), Vanderbilt University Medical Center, Nashville, TN. edwin.trevathan@vumc.org.