Independent NF1 mutations in two large families with spinal neurofibromatosis. Issue 2 (1st February 2003) - Messiaen, L; Riccardi, V; Peltonen, J; Maertens, O; Callens, T; Karvonen, S L; Leisti, E-L; Koivunen, J; Vandenbroucke, I; Stephens, K; Pöyhönen, M