[A study on factors concerned with smoking behavior among pupils of junior high school. Part 1. Factors related to the first cigarette and the situation in smoking now].
D000293:Adolescent; D000367:Age Factors; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D000297:Psychology, Adolescent; D012907:Smoking; D011795:Surveys and Questionnaires