[1] INST NATL NEUROL, NEUROBIOL MOLEC & NEUROPATHOL LAB, RABTA, TUNISIA
[2] FAC MED STRASBOURG, GENET MOLEC LAB,CNRS,U 184,INSERM, STRASBOURG, FRANCE
[3] CTR HOSP REG & UNIV STRASBOURG, STRASBOURG, FRANCE
[4] GENETHON, EVRY, FRANCE
[5] CTR ETUD POLYMORPHISME HUMAIN, PARIS, FRANCE
[6] IST NEUROCHIRURG C BESTA, I-20133 MILAN, ITALY
[7] UNIV TIRANA, DEPT PEDIAT, Tirana, ALBANIA
[8] UNIV CATTOLICA SACRO CUORE, CHAIR HUMAN GENET, I-00168 ROME, ITALY