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Secondhand smoke exposure is high among college students, a study in the journal Nicotine & Tobacco Research has found. The study analyzed 4,223 undergraduates at 10 colleges and universities in North Carolina, and found that 83 percent reported exposure to secondhand smoke at least once in the past week. The research was conducted by scientists at Wake Forest University. A statement by Mark Wolfson, lead author on the study, said: "While some college campuses are smoke free, others have virtually no restrictions on smoking, not even in the residence halls. There is a growing national movement to move away from that, but it still very much varies by campus. In this first study to evaluate SHS exposure among college students, we were really kind of floored to see how many, and how frequently, students are exposed to it."