This is a longitudinal study that was conducted from October 2007-April 2008 as academic year at UMSU in West Azerbaijan Province, Iran. It has four public universities
and three private universities and almost all students come from Iran. UMSU as the research unit has four schools including Medicine, Nursing and Midwifery, Health and Paramedics. During study period, there were 616 new students and the sample size was calculate as 173 including 80 paramedics’ students, 75 students studying
at the department of Health, 35 medical students, 25 nursing students and 25 midwifery students, respectively