1 Subjects: “...cigarette smoke...”

2 Subjects: “...Cigarette Smoking / adverse effects...”

3 Subjects: “...Cigarette Smoking / adverse effects...”

4 Subjects: “...cigarette smoking...”

5 Subjects: “...Cigarette Smoking...”

6 Subjects: “...Cigarette smoke / Filtration...”

7 Subjects: “...mainstream cigarette smoke...”

8 Subjects: “...cigarette smoke...”

9 Subjects: “...cigarette smoking...”

10 Subjects: “...cigarette smoking...”

11 Subjects: “...cigarette smoke extract...”

12 Subjects: “...cigarette smoking...”

13 Subjects: “...cigarette smoke exposure...”