[1] Clin Santa Rita, Dept Colorectal Surg, Vercelli, Italy
[2] HuGeF Human Genet Fdn, Mol & Genet Epidemiol Unit, Turin, Italy
[3] Univ Turin, Dept Comp Sci, Turin, Italy
[4] HuGeF Human Genet Fdn, Genom Variat Human Populat & Complex Dis Unit, Turin, Italy