Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KASHKOULI MB,Late and very late initial probing for congenital nasolacrimal duct obstruction : what is the cause of failure?,Br J Ophthalmol,,,2003,87,,1511-1153,https://cir.nii.ac.jp/crid/1573105975384292224,