170-172 Warren
نویسندگان
چکیده
for Disease Control and Prevention (CDC) to measure high-priority health-risk behaviors among adolescents at the national, state and local levels.6 We address three questions in this article: What were the trends in sexual behavior among U.S. high school students during the early 1990s? How does sexual behavior vary by race and ethnicity, and how have these differences changed over time? And finally, how does sexual behavior vary by gender and how have these differences changed over time?
منابع مشابه
EAE/ASE RECOMMENDATIONS Recommendations for the Evaluation of Left Ventricular Diastolic Function by Echocardiography
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PAGE INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 Results.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 DISCUSSION....
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