RT Journal Article SR Electronic T1 Risk factors associated with esophageal cancer in North of Iran JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1141 OP 1143 VO 28 IS 7 A1 Abdolvahab Moradi A1 Khodaberdi Kalavi A1 Durdi Qujeq A1 Ezzat-Ollah Ghaemi A1 Abdoljalal Marjani A1 Araz Ghourchaei YR 2007 UL http://smj.org.sa/content/28/7/1141.abstract AB