Molecular characterisation of a ring chromosome 22 in a patient with severe language delay: a contribution to the refinement of the subtelomeric 22q deletion syndrome. Issue 4 (1st April 2002) - De Mas, P; Chassaing, N; Chaix, Y; Vincent, M-C; Julia, S; Bourrouillou, G; Calvas, P; Bieth, E