Semb, Gunvor, Brattström, Viveca, Mølsted, Kirsten, Prahl-Andersen, Birte, Rumsey, Nichola, Shaw, William C., "The Eurocleft study: Intercenter study of treatment outcome in patients with complete cleft lip and palate. Part 1: Introduction and treatment experience", Cleft Palate-Craniofacial Journal, 2005