1. U.O.C. Genetica Medica, Istituto Giannina Gaslini, Genova, Italy
2. Present Address: Istituto di Biofisica, CNR, Genova, Italy
3. Laboratorio di Oncologia, IRCCS G. Gaslini, Genova, Italy
4. Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health and CEBR, Università degli Studi di Genova, Genova, Italy