<qa>  What is the name of the study that will examine how menthol affects smoking behaviors andThis study will examine how menthol affects smoking behaviors and biomarker level when menthol smokers switch to non-menthol cigarettes. Participants will initially smoke their preferred brand control cigarettes, followed by smoking Camel Crush cigarettes, which have the ability to be menthol or non-menthol. Participants given Camel Crush cigarettes will smoke them as menthol, then non-menthol cigarettes for 15 days each. Participants will provide breath and urine samples to measure smoke exposures, track cigarette usage to establish changes in daily cigarette consumption and complete smoking topography assessments of smoking behavior, such as puff volume. 