RT Journal Article SR Electronic T1 Endoscopic dacryocystorhinostomy for primary nasolacrimal duct obstruction. JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1611 OP 1613 VO 28 IS 10 A1 Farahani, Farhad A1 Hashemian, Farnaz A1 Fazlian, Mohammad M. YR 2007 UL http://smj.org.sa/content/28/10/1611.abstract AB