SS LS LL Total Number % Number % Number % Number Addicts 11 33.3 11 33.3 9 27.4 31 Control 6 19.4 12 38.7 13 42.9 31 Total 17 27.4 23 37.1 22 35.5 62

Table 2: 5-HTTLPR genotypes frequencies in addicts and controls.