title: Nasolacrimal duct obstruction study.
mesh_terms: D003608:Dacryocystorhinostomy; D006801:Humans; D007223:Infant; D007767:Lacrimal Duct Obstruction / Q000151:congenital* / Q000191:economics / Q000503:physiopathology; D009301:Nasolacrimal Duct / Q000503:physiopathology / Q000601:surgery; D012075:Remission, Spontaneous