Links:
[1] http://med.mui.ac.ir/?q=gosh/content/%D9%84%D9%8A%D8%B3%D8%AA-%D9%85%D9%86%D8%A7%D8%A8%D8%B9-36-%D8%A7%D9%85-%D8%AF%D9%88%D8%B1%D9%87-%D8%A2%D8%B2%D9%85%D9%88%D9%86-%D9%BE%D8%B0%D9%8A%D8%B1%D8%B4-%D8%AF%D8%B3%D8%AA%D9%8A%D8%A7%D8%B1-%D9%81%D9%88%D9%82-%D8%AA%D8%AE%D8%B5%D8%B5%D9%8A
[2] http://med.mui.ac.ir/sites/default/files/users/ghb-ent/Refrence.pdf