a. Age-adjusted incidence of NTM infection per 100,000 population by sex (2003–2016). From Park SC, Kang MJ, Han CH, et al. Prevalence, incidence, and mortality of nontuberculous mycobacterial infection in Korea: a nationwide population-based study. BMC Pulm Med. Aug 1 2019;19(1):140. doi:10.1186/s12890-019-0901-z; with permission. 6b. Incidence of NTM infection per 100,000 population by age group (2003–2016) (Park et al., 2019); with permission. (Figure 2 in original)