Using combination nicotine replacement therapy(NRT),such as a patch plus a gum or lozenge,can increase the chances of successfully stopping smoking by 15% to 36%,compared with using single-form NRT,results of a Cochrane review have revealed.A total of 63 trials were identified comprising 41,509 participants,most of whom were from the community or from healthcare clinics and smoked at least 15 cigarettes per day.
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