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The epidemiology and direct medical expenditure associated with NTM diseases in South Korea between 2010 and 2021. (A) Prevalence of TB and NTM by year. (B) Prevalence of NTM by age groups (2010–2021). (C) Proportion (%) of patients ≥65 years. (D) Mean individual expenditure by age groups (2010–2021). Abbreviations: NTM, nontuberculous mycobacterial; TB, tuberculosis.
