''The three main Mediterranean
islands studied show evidence of different patterns
of human peopling, with Corsica and Sicily
closely associated with neighboring continental populations,
while Sardinia shows a marked feature of
isolation, with some possible ancient contact with
the Iberian Peninsula.''

“Peopling of Three Mediterranean Islands (Corsica, Sardinia, and Sicily) Inferred by Y-Chromosome Biallelic Variability”
Francalacci, P., Morelli, L., Underhill, P. A., Lillie, A. S., Passarino, G., Useli, A., Madeddu, R., Paoli, G., Tofanelli, S., Calo, C. M., Ghiani, M. E., Varesi, L., Memmi, M., Vona, G., Lin, A. A., Oefner, P., Cavalli-Sforza, L. L.

American Journal of Physical Anthropology, 2003, volume 121, pages 270-279