title: Aggression: Is that an issue for worrying?
authors.affiliation: Dept. of Community Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Veda
authors.initials: V
authors.lastname: Vakili
authors.affiliation: Dept. of Community Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Maliheh
authors.initials: M
authors.lastname: Ziaee
authors.affiliation: Student Researches Committee, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ahmadreza
authors.initials: A
authors.lastname: Zarifian