Please check this link for an accurate answer. hope it helps http://www.nha.org.qa/sch/En/content.jsp?menuId=3 and http://www.nha.org.qa/sch/En/content.jsp?menuId=6
Please check this link for an accurate answer. hope it helps http://www.nha.org.qa/sch/En/content.jsp?menuId=3 and http://www.nha.org.qa/sch/En/content.jsp?menuId=6