Design and methods of study 311: An open-label, multicenter study of perampanel oral suspension in pediatric subjects (Ages 4 to <12 years) with inadequately controlled partial seizures or primary generalized tonic-clonic seizures. (June 2017) - Wheless, J.; Nayudu, A.; Bibbiani, F.; Laurenza, A.; Patten, A.; Rege, B.