Y2K − Ungdom mot år 2000 - Insamling av data och prover från 20-åringarna

411 adolescents born in 1978 or 1979 in two socioeconomically different cities are included in the study. Collection of the material has occurred three times for each youth, at...本研究纳入了411名于1978年或1979年出生、来自两座社会经济水平迥异的城市的青少年。针对每位青少年，本研究共完成了三次资料采集，采集时点分别为……