Aspartylglucosaminuria: unusual neonatal presentation in qatari twins with a novel aspartylglucosaminidase gene mutation and 3 new cases in a Turkish family - Opladen, Thomas; Sengupta, Devjani; Moog, Ute; Fischer, Christine; Bürger, Friederike; Haas, Dorothea; Harting, Inga; Hoffmann, Georg F. (Journal of child neurology, 2014)