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机译:从2002年到减少青少年吸食大麻2006年,在31日晚上与朋友的链接欧洲和北美国家地区。
Research Department, Swiss Institute for the Prevention of Alcohol and Drug Problems, Lausanne, Switzerland. ekuntsche@sfa-ispa.ch;
Friends; Adolescent; Marijuana SmokingAdolescent BehaviorIntermediate frequenciesHealth BehaviorEVENINGAmerica;