8p23.1 duplication syndrome; common, confirmed, and novel features in six further patients

John C.K. Barber, Jill A. Rosenfeld, Nicola Foulds, Sophie Laird, Mark S. Bateman, N. Simon Thomas, Samantha Baker, Viv K. Maloney, Arayamparambil Anilkumar, Wendy E. Smith, Valerie Banks, Sara Ellingwood, Yara Kharbutli, Lakshmi Mehta, Keith A. Eddleman, Michael Marble, Regina Zambrano, John A. Crolla, Allen N. Lamb