B Canan Demirbag

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METHODS Students attending five different types of high schools in central Elazig (a city in Turkey) during the 2009-2010 school year constitute the study population. One class was randomly selected from each high school. Out of 650 students, 640 participated in the study. The data were evaluated by using the SPSS program; percentage, mean, and chi-square(More)
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