Skolelevers drogvanor - 1982, årskurs 9

Since 1971, a national drug habit survey has been conducted among Swedish ninth graders. From 2004, annual survey are also being conducted among students in the second year of...

自1971年起，一项全国药物使用习惯调查便面向瑞典九年级学生持续开展。自2004年起，研究团队亦同步针对……阶段二年级学生开展年度调查。