2.1. Analysis.
Comparison 2 Subgroup: Mitomycin C dacryocystorhinostomy versus dacryocystorhinostomy alone, Outcome 1 Functional success, defined as the relief of epiphora at 6 months.
Comparison 2 Subgroup: Mitomycin C dacryocystorhinostomy versus dacryocystorhinostomy alone, Outcome 1 Functional success, defined as the relief of epiphora at 6 months.