Protracted course of N-acetylaspartic aciduria in two non-Jewish siblings: identical clinical and magnetic resonance imaging findings. - Zafeiriou,D.I.; Kleijer,W.J.; Maroupoulos,G.; Anastasiou,A.L.; Augoustidou-Savvopoulou,P.; Papadopoulou,F. (Brain Dev, 1999)