Fig. 1From: Incremental economic burden associated with exudative age-related macular degeneration: a population-based studySample selection flow. AMD, age-related macular degeneration; DB, database; NHIS, National Health Insurance Service. aCandidates for the non-AMD group were preliminarily matched to the exudative AMD group in a 1:10 to 1:20 ratio by age group and date of healthcare facility visitsBack to article page