RT Journal Article SR Electronic T1 Transnasal upper gastrointestinal endoscopy in detection of gastroesophageal reflux disease induced vocal cord polyp JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 780 OP 781 VO 21 IS 8 A1 Sandokji, Abdulkareem M. A1 Al-Karawi, Mohamed A. A1 Sanai, Faisal M. YR 2000 UL http://smj.org.sa/content/21/8/780.abstract AB