Aphthous Ulcer and the Effective Factors on It`s Incidence among the Students of Golestan Medical Sciences University in the North of Iran

Saeedeh Eris, Ezzat Ollah Ghaemi, Abdolvahab Moradi, Azad Reaza Mansourian, Mohammad Reza Rabiei, Sepideh Bakhashande Nosrat, Ali Amirchaghmaghi and Ali Reza Ahmadi

Journal of Biological Sciences 7 ( 5 ): 830 - 832 , 2007