If patient is eligible for this trial, he will be enrolled in this trial and randomized. Randomization will be performed using a web-based procedure. Study participants will be randomized to electronic cigarette added to standard counselling or only standard counselling. A calendar will be given to the patient to remember the dates of visits or telephone counselling. After the first visit patient will be followed every ten days for the first two month through outpatient clinic visits and telephone counselling. After the first two months patient will return at institute for a last outpatient clinic visit at sixth month.