Phenotype-genotype correlation in 20 deletion and 20 non-deletion Angelman syndrome patients. - Moncla,A.; Malzac,P.; Voelckel,M.A.; Auquier,P.; Girardot,L.; Mattei,M.G.; Philip,N.; Mattei,J.F.; Lalande,M.; Livet,M.O. (Eur J Hum Genet, 1999)