- Researchers want to see how well the QuitTXT text-message program helps smokers ages 18 29 stop smoking. This is part of a larger online stop-smoking program by the National Cancer Institute. The QuitTXT program is a 2-week countdown to the smoker s quit date with 6 weeks of follow-up messages. Program participants will receive texts on their cell phones, including tips, information, and motivational messages, and then fill out surveys.