본 연구에서는 예산상의 이유로 Varenicline을 4주간만 제공했는데 참가자들의 평균 복용일수가 17.1일에 불과하였다.
In this study, for budgetary reasons, Varenicline was only given for 4 weeks, but the average number of days of taking it was only 17.1 days.