Position effect on PLP1 may cause a subset of Pelizaeus-Merzbacher disease symptoms. Issue 12 (9th December 2004) - Muncke, N; Wogatzky, B S; Breuning, M; Sistermans, E A; Endris, V; Ross, M; Vetrie, D; Catsman-Berrevoets, C E; Rappold, G