Links
[1] https://disorders.eyes.arizona.edu/references/identification-igsf3-mutation-family-congenital-nasolacrimal-duct-obstruction
[2] https://disorders.eyes.arizona.edu/references/congenital-dacryocystocele-there-familial-predisposition
[3] https://disorders.eyes.arizona.edu/references/case-congenital-atresia-lacrimal-ducts-familial-characteristics